The real mission of life for the conditioned soul is to reestablish the forgotten relationship with the Supreme Personality of Godhead and engage in devotional service so that he may revive Kṛṣṇa consciousness after giving up the body. One doesn't have to give up his occupation as a brāhmaṇa, kṣatriya, vaiśya, śūdra or whatever. In any position, while discharging his prescribed duty, one can develop Kṛṣṇa consciousness simply by associating with devotees who are representatives of Kṛṣṇa and who can teach this science. Regretfully, the big politicians and leaders in the material world simply create enmity and are not interested in spiritual advancement. Material advancement may be very pleasing to an ordinary man, but ultimately he is defeated because he identifies himself with the material body and considers everything related to it to be his property. This is ignorance. Actually nothing belongs to him, not even the body. By one's karma, one gets a particular body, and if he does not utilize his body to please the Supreme Personality of Godhead, all his activities are frustrated. The real purpose of life is stated in Śrīmad-Bhāgavatam (1.2.13):
ataḥ pumbhir dvija-śreṣṭhā
varṇāśrama-vibhāgaśaḥ
svanuṣṭhitasya dharmasya
saṁsiddhir hari-toṣaṇam
It really doesn't matter what activity a man engages in. If he can simply satisfy the Supreme Lord, his life is successful.
(Srimad Bhagavatam----5:14:40----purport).

The embodied soul lives in the city of nine gates. The activities of the body, or the figurative city of body, are conducted automatically by its particular modes of nature. The soul, although subjecting himself to the conditions of the body, can be beyond those conditions, if he so desires. Owing only to forgetfulness of his superior nature, he identifies with the material body, and therefore suffers. By Kṛṣṇa consciousness, he can revive his real position and thus come out of his embodiment. Therefore, when one takes to Kṛṣṇa consciousness, one at once becomes completely aloof from bodily activities. In such a controlled life, in which his deliberations are changed, he lives happily within the city of nine gates. The nine gates are mentioned as follows:
nava-dvāre pure dehī
haṁso lelāyate bahiḥ
vaśī sarvasya lokasya
sthāvarasya carasya ca
"The Supreme Personality of Godhead, who is living within the body of a living entity, is the controller of all living entities all over the universe. The body consists of nine gates (two eyes, two nostrils, two ears, one mouth, the anus and the genitals). The living entity in his conditioned stage identifies himself with the body, but when he identifies himself with the Lord within himself, he becomes just as free as the Lord, even while in the body." (Śvetāśvatara Upaniṣad 3.18)
Therefore, a Kṛṣṇa conscious person is free from both the outer and inner activities of the material body.
(Bhagavad-Gita----5:13----purport).

The living entity, as will be explained in the Seventh Chapter, is one of the energies or natures of the Supreme Lord but is distinct from matter, which is another nature—called inferior—of the Lord. Somehow the superior nature, the living entity, has been in contact with material nature since time immemorial. The temporary body or material dwelling place which he obtains is the cause of varieties of activities and their resultant reactions. Living in such a conditional atmosphere, one suffers the results of the activities of the body by identifying himself (in ignorance) with the body. It is ignorance acquired from time immemorial that is the cause of bodily suffering and distress. As soon as the living entity becomes aloof from the activities of the body, he becomes free from the reactions as well. As long as he is in the city of body, he appears to be the master of it, but actually he is neither its proprietor nor controller of its actions and reactions. He is simply in the midst of the material ocean, struggling for existence. The waves of the ocean are tossing him, and he has no control over them. His best solution is to get out of the water by transcendental Kṛṣṇa consciousness. That alone will save him from all turmoil.
(Bhagavad-Gita----5:14----purport).

A living entity is, by superior nature, full of knowledge. Nevertheless, he is prone to be influenced by ignorance due to his limited power. The Lord is omnipotent, but the living entity is not. The Lord is vibhu, or omniscient, but the living entity is aṇu, or atomic. Because he is a living soul, he has the capacity to desire by his free will. Such desire is fulfilled only by the omnipotent Lord. And so, when the living entity is bewildered in his desires, the Lord allows him to fulfill those desires, but the Lord is never responsible for the actions and reactions of the particular situation which may be desired. Being in a bewildered condition, therefore, the embodied soul identifies himself with the circumstantial material body and becomes subjected to the temporary misery and happiness of life. The Lord is the constant companion of the living entity as Paramātmā, or the Supersoul, and therefore He can understand the desires of the individual soul, as one can smell the flavor of a flower by being near it. Desire is a subtle form of conditioning for the living entity. The Lord fulfills his desire as he deserves: Man proposes and God disposes. The individual is not, therefore, omnipotent in fulfilling his desires. The Lord, however, can fulfill all desires, and the Lord, being neutral to everyone, does not interfere with the desires of the minute independent living entities. However, when one desires Kṛṣṇa, the Lord takes special care and encourages one to desire in such a way that one can attain to Him and be eternally happy.
(Bhagavad-Gita----5:15----purport).

E

quanimity of mind, as mentioned above, is the sign of self-realization. Those who have actually attained to such a stage should be considered to have conquered material conditions, specifically birth and death. As long as one identifies with this body, he is considered a conditioned soul, but as soon as he is elevated to the stage of equanimity through realization of self, he is liberated from conditional life. In other words, he is no longer subject to take birth in the material world but can enter into the spiritual sky after his death. The Lord is flawless because He is without attraction or hatred. Similarly, when a living entity is without attraction or hatred, he also becomes flawless and eligible to enter into the spiritual sky.
(Bhagavad-Gita----5:19----purport).

The symptoms of the self-realized person are given herein. The first symptom is that he is not illusioned by the false identification of the body with his true self. He knows perfectly well that he is not this body, but is the fragmental portion of the Supreme Personality of Godhead. He is therefore not joyful in achieving something, nor does he lament in losing anything which is related to his body. This steadiness of mind is called sthira-buddhi, or self-intelligence. He is therefore never bewildered by mistaking the gross body for the soul, nor does he accept the body as permanent and disregard the existence of the soul. This knowledge elevates him to the station of knowing the complete science of the Absolute Truth, namely Brahman, Paramātmā and Bhagavān. He thus knows his constitutional position perfectly well, without falsely trying to become one with the Supreme in all respects. This is called Brahman realization, or self-realization. Such steady consciousness is called Kṛṣṇa consciousness.
(Bhagavad-Gita----5:20----purport).

Whenever a devotee is in distress or has fallen into difficulty, he thinks that it is the Lord's mercy upon him. He thinks, "Thanks to my past misdeeds I should suffer far, far greater than I am suffering now. So it is by the mercy of the Supreme Lord that I am not getting all the punishment I am due. I am just getting a little, by the mercy of the Supreme Personality of Godhead." Therefore he is always calm, quiet and patient, despite many distressful conditions. A devotee is also always kind to everyone, even to his enemy. Nirmama means that a devotee does not attach much importance to the pains and trouble pertaining to the body because he knows perfectly well that he is not the material body. He does not identify with the body; therefore he is freed from the conception of false ego and is equipoised in happiness and distress.
(Bhagavad-Gita----5:12:13-14----purport).

This body is the field of activity for the conditioned soul. The conditioned soul is entrapped in material existence, and he attempts to lord it over material nature. And so, according to his capacity to dominate material nature, he gets a field of activity. That field of activity is the body. And what is the body? The body is made of senses. The conditioned soul wants to enjoy sense gratification, and, according to his capacity to enjoy sense gratification, he is offered a body, or field of activity. Therefore the body is called kṣetra, or the field of activity for the conditioned soul. Now, the person, who should not identify himself with the body, is called kṣetra-jña, the knower of the field. It is not very difficult to understand the difference between the field and its knower, the body and the knower of the body. Any person can consider that from childhood to old age he undergoes so many changes of body and yet is still one person, remaining. Thus there is a difference between the knower of the field of activities and the actual field of activities.
(Bhagavad-Gita----13:1-2----purport).

False ego means accepting this body as oneself. When one understands that he is not his body and is spirit soul, he comes to his real ego. Ego is there. False ego is condemned, but not real ego. In the Vedic literature (Bṛhad-āraṇyaka Upaniṣad 1.4.10) it is said, ahaṁ brahmāsmi: I am Brahman, I am spirit. This "I am," the sense of self, also exists in the liberated stage of self-realization. This sense of "I am" is ego, but when the sense of "I am" is applied to this false body it is false ego. When the sense of self is applied to reality, that is real ego. There are some philosophers who say we should give up our ego, but we cannot give up our ego, because ego means identity. We ought, of course, to give up the false identification with the body.
(Bhagavad-Gita----13:8:12----purport).