"Whomever you meet, instruct him on the teachings of Kṛṣṇa. In this way, on My order, become a spiritual master and deliver the people of this country." (CC-2:7:128) Simply trying to follow the orders of Śrī Caitanya Mahāprabhu, we speak to the people of the world about Bhagavad-gītā As It Is. This will make us qualified to satisfy the Supreme Personality of Godhead, Kṛṣṇa.
(Sri Caitanya Caritamrta----1:17:78----purport).

"The orders of Śrī Caitanya Mahāprabhu must be carefully carried out. Although the Lord may not give direct orders, you are still to carry out His desires simply by understanding His indications."
(Sri Caitanya Caritamrta----2:11:122----translation).

Kṛṣṇa-kathā means narrations about Lord Kṛṣṇa. There are two kṛṣṇa-kathās: narrations spoken by Kṛṣṇa and narrations spoken about Kṛṣṇa. The Bhagavad-gītā is the narration or the philosophy on the science of God, spoken by Kṛṣṇa Himself. Śrīmad-Bhāgavatam is the narration about the activities and transcendental pastimes of Kṛṣṇa. Both are kṛṣṇa-kathā. It is the order of Lord Caitanya that kṛṣṇa-kathā should be spread all over the world, because if the conditioned souls, suffering under the pangs of material existence, take to kṛṣṇa-kathā, then their path of liberation will be open and clear. The purpose of presenting this book is primarily to induce people to understand Kṛṣṇa or kṛṣṇa-kathā, because thereby they can become freed from material bondage.
(Krsna Book).

Our actual duty is to carry out the supreme order of the Personality of Godhead. If we are fixed in our determination to carry out the supreme order of the Lord, we are always secure, regardless of where we are situated, whether in hell or in heaven. Herein the words prakṛtiṁ bhajasva are very significant. Prakṛtim refers to one's constitutional position. Every living entity has the constitutional position of being an eternal servant of God. Therefore Lord Brahmā advised Priyavrata, "Be situated in your original position as an eternal servant of the Lord. If you carry out His orders, you will never fall, even in the midst of material enjoyment." Material enjoyment achieved by dint of one's fruitive activities differs from material enjoyment given by the Supreme Personality of Godhead. A devotee sometimes appears to be in a very opulent position, but he accepts that position to follow the orders of the Supreme Personality of Godhead. Therefore a devotee is never affected by material influences. The devotees in the Kṛṣṇa consciousness movement are preaching all over the world in accordance with the order of Śrī Caitanya Mahāprabhu. They have to meet many karmīs, but by the mercy of Śrī Caitanya Mahāprabhu, they are unaffected by material influences.
(Srimad Bhagavatam----5:1:19----purport).

Because of their compassion for the poor fallen souls. the six Gosvāmīs gave up their exalted positions as ministers and took vows as mendicants. Thus minimizing their bodily wants as far as possible, they each accepted only a loincloth and a begging bowl. Thus they remained in Vṛndāvana to execute the orders of Śrī Caitanya Mahāprabhu by compiling and publishing various Vaiṣṇava literatures.
(Srimad Bhagavatam----5:1:26----purport).

"One should chant the holy name of the Lord in a humble state of mind, thinking oneself lower than the straw in the street; one should be more tolerant than a tree, devoid of all sense of false prestige and should be ready to offer all respects to others. In such a state of mind one can chant the holy name of the Lord constantly." Following the orders of Śrī Caitanya Mahāprabhu, one who preaches the glories of the Lord all over the world or all over the universe should be humbler than grass and more tolerant than a tree because a preacher cannot live an easygoing life. Indeed, a preacher must face many impediments. Not only is he sometimes cursed, but sometimes he must also suffer personal injury. For example, when Nityānanda Prabhu went to preach Kṛṣṇa consciousness to the two roguish brothers Jagāi and Mādhāi, they injured Him and made His head bleed, but nevertheless, He tolerantly delivered the two rogues, who became perfect Vaiṣṇavas. This is the duty of a preacher. Lord Jesus Christ even tolerated crucifixion. Therefore the curse against Nārada was not very astonishing, and he tolerated it.
(Srimad Bhagavatam----6:5:44----purport).

A sannyāsī is supposed to beg from door to door. He does not beg simply because he is hungry. His real purpose is to enlighten the occupant of every house by preaching Kṛṣṇa consciousness. A sannyāsī does not abandon his superior position and become a beggar just for the sake of begging. Similarly, a person in householder life may be very important, but he may also voluntarily take to the mendicant way of life. Rūpa Gosvāmī and Sanātana Gosvāmī were ministers, but they voluntarily accepted the mendicant's life in order to humbly preach Śrī Caitanya Mahāprabhu's message. It is said about them: tyaktvā tūrṇam aśeṣa-maṇḍala-pati-śreṇīṁ sadā tuccha-vat bhūtvā dīna-gaṇeśakau karuṇayā kaupīna-kanthāśritau. Although the Gosvāmīs were very aristocratic, on the order of Śrī Caitanya Mahāprabhu they became mendicants just to deliver the fallen souls. One should also consider that those who engage in the missionary activities of the Kṛṣṇa consciousness movement are under the guidance of Śrī Caitanya Mahāprabhu. They are not actually beggars; their real business is to deliver fallen souls. Therefore they may go from door to door just to introduce a book about Kṛṣṇa consciousness so that people can become enlightened by reading. Formerly brahmacārīs and sannyāsīs used to beg from door to door. At the present moment, especially in the Western countries, a person may be handed over to the police if he begs from door to door. In Western countries, begging is considered criminal. Members of the Kṛṣṇa consciousness movement have no business begging. Instead, they work very hard to introduce some literatures about Kṛṣṇa consciousness so that people can read them and be benefited. But if one gives some contribution to a Kṛṣṇa conscious man, he never refuses it.
(Sri Caitanya Caritamrta----2:8:39----purport).