SB 11.9.28
srstva purani vividhany ajayatma-saktya
vrksan sarisrpa-pasun khaga-dandasukan
tais tair atusta-hrdayah purusam vidhaya
brahmavaloka-dhisanam mudam apa devah
Translation:
The Supreme Personality of Godhead, expanding His own potency, maya-sakti, created innumerable species of life to house the conditioned souls. Yet by creating the forms of trees, reptiles, animals, birds, snakes and so on, the Lord was not satisfied within His heart. Then He created human life, which offers the conditioned soul sufficient intelligence to perceive the Absolute Truth, and became pleased.
Purport:
God has specifically created the human form of life to facilitate the liberation of the conditioned soul. Therefore one who abuses human life prepares his path to hell. As stated in the Vedas, purusatve cavistaram atma: “In the human form of life there is good possibility of understanding the eternal soul.” The Vedas also state:
tabhyo gam anayat ta abruvan
na vai no ’yam alam iti
tabhyo ’svam anayat ta abruvan
na vai no ’yam alam iti
tabhyah purusam anayat ta
abruvan su-krtam bata
The purport of this sruti-mantra is that lower forms of life, such as the cow and horse, are not actually suitable to fulfill the purpose of creation. But human life awards the opportunity to understand one’s eternal relationship with God. Thus, one must control the material senses and fulfill the real purpose of human life. If one takes to Krsna consciousness, the Supreme Lord personally feels happiness and gradually reveals Himself to His devotee.
The Lord’s material creation consists of the living entities and dead matter, which the less intelligent try to enjoy. The Lord, however, is not satisfied by those species that blindly strive for sense gratification without understanding spiritual nature. We are suffering due to our forgetfulness of Krsna and the blissful situation of His abode. If we accept the Lord as protector and shelter and execute His order, we can easily revive our eternal, blissful nature as parts and parcels of the Personality of Godhead. It is for this purpose that the Lord has created human life.