The conditioned souls rotating in the evolutionary cycle from the aquatics up to the form of Brahmā are all in the form of māyā, or the form obtained by one's own actions and awarded by material nature. The material forms of the conditioned soulsare all foreign dresses, and when the conditioned soul becomes liberated from the clutches of material energy, he attains his original form.
(SRIMAD BHAGAVATAM--------1:9:39-------PURPORT).

The grossly materialistic demons are so completely bereft of spiritual knowledge that although at every moment they perceive the transience of the material body, all their activities center on the body. They are unable to understand that the soul within the body is the permanent and essential substance and that the body is mutable and temporary. Becoming first enamoured of then deluded by vivartavāda (the theory of evolution), they conclude that the entire cosmic body also lacks a Soul. Since the fallacious theory they apply to their own physical existence leads them to reject any research into the existence of a soul residing within the body, they fail to perceive the presence of the Supersoul within the gigantic body of the cosmic manifestation.
(RENUNCIATION THROUGH WISDOM).

The living entity is unborn. It is not that he is manifest with the creation of the material body. On the other hand, it is true that the material body develops only by the desire of the living entity. The evolution of the material body is due to the desires of the living being. According to the desires of the living being, the material body develops. So from the spirit soul the material body comes into existence, generated from the living force.
(SRIMAD BHAGAVATAM--------2:7:49-------PURPORT).

Intelligent human beings must always remember that the soul obtains a human form after an evolution of many millions of years in the cycle of transmigration. The material world is sometimes compared to an ocean, and the human body is compared to a solid boat designed especially to cross this ocean. The Vedic scriptures and the ācāryas, or saintly teachers, are compared to expert boatmen, and the facilities of the human body are compared to favorable breezes that help the boat ply smoothly to its desired destination. If, with all these facilities, a human being does not fully utilize his life for self-realization, he must be considered ātma-hā, a killer of the soul. Śrī Īśopaniṣad warns in clear terms that the killer of the soul is destined to enter into the darkest region of ignorance to suffer perpetually.
(SRI ISHONISHAD).

Since time immemorial, living entities have been going through many lower species of life, gradually rising through the evolutionary process and, due to some good fortune, receiving a human birth. In the lower species of life the spirit souls are densely covered by the material modes, and thus carnal appetites dominate their lives. Among the human species, some denounce sensual pleasures and are honored by the world as a saints, yogīs, philosophers, scholars, and so on. They experience mental perceptions far superior to gross sensual experiences, and may reach even subtler levels of fine intellect. But even more subtle than the intellect is the spirit soul. So true spirituality, or the real religion of the living entity, means to be situated in self.
(RENUNCIATION THROUGH WISDOM).

The human form of life is called arthada because the body can very nicely help the embodied soul to achieve the highest perfection. Prahlāda Mahārāja said that even though temporary, the body can give us the highest perfectional achievement. In the process of evolution from the lower to the higher grade of living, the human form of life is a great boon. But māyā is so strong that in spite of achieving this great boon of the human form of life, we are influenced by temporary material happiness, and we forget our goal of life.
(SRIMAD BHAGAVATAM--------4:7:44-------PURPORT).

In Bhagavad-gītā it is also said that the Lord impregnates the material energy with the part-and-parcel jīvas, and thus the different forms and different activities immediately ensue. Because of the different desires and karmic activities of the jīva soul, different types of bodies in different species are produced. In Darwin's theory there is no acceptance of the living entity as spirit soul, and therefore his explanation of evolution is incomplete.
(SRIMAD BHAGAVATAM--------4:11:17-------PURPORT).

Foolish persons do not know that the soul is passing through 8,400,000 spieces of life. By the gradual process of evolution, when one comes to the human form of life, he is supposed to follow the rules and regulations laid down in the Vedas.
(SRIMAD BHAGAVATAM--------4:26:8-------PURPORT).

The materialistic philosopher Darwin has tried to study the changes of the gross body, but because he had no knowledge of either the subtle body or the soul, he could not clearly explain how the evolutionary process is going on. One may change the gross body, but he works in the subtle body. People cannot understand the activities of the subtle body, and consequently they are bewildered as to how the actions of one gross body affect another gross body.
(SRIMAD BHAGAVATAM--------4:29:60-------PURPORT).

The word grāmya-karmaṇā indicates activities meant only for the improvement of bodily comforts, presently all human society is engaged in improving economic conditions and bodily comforts, people are not interested in knowing what is going to happen after death, nor do they believe in the transmigration of the soul. When one scientifically studies the evolutionary theory, one can understand that human life is a junction where one may take the path of promotion or degradation. As stated in Bhagavad-gītā (9.25):
yānti deva-vratā devān
pitṟn yānti pitṛ-vratāḥ
bhūtāni yānti bhūtejyā
yānti mad-yājino 'pi mām
"Those who worship the demigods will take birth among the demigods; those who worship ghosts and spirits will take birth among such beings; those who worship ancestors go to the ancestors; and those who worship Me will live with Me."

(SRIMAD BHAGAVATAM--------5:14:31-------PURPORT).

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