Human civilization is based on four regulating principles and four pillars.
The four regulating principles are:
Do not have illicit sex, outside of marriage, because too much sex ruins purity.
Do not eat meat, fish, eggs, and avoid garlic and onions, as these destroy mercy, compassion.
Abstain from all intoxicants such as alcohol, tobacco, caffeine, tea, marijuana and other drugs, as these destroy austerity.
Do not indulge in gambling or monetary speculation, for this ruins truthfulness, honesty.
The four pillars are:
Mercy, austerity, purity and truthfulness. By following the four regulative principles, we support these pillars and free ourselves from the suffering that arises from not following them.
Chanting the Holy Names of the Lord while following the four regulative principles and these four pillars is the basis of Krishna consciousness.
The three spiritual options.
1) Take refuge in Krishna, rather than taking refuge in drugs or toxic substances, believing that this will alleviate suffering.
2) To seek true pleasure in Krishna consciousness, rather than taking drugs in the belief that one is having fun.
3) “Soar forever”. Krishna consciousness is the natural way to permanently raise one's consciousness. We are already in the grip of illusion in this material world, and drugs take us away from Krishna, God, the Supreme Person. Human life is a precious chance to awaken to the Absolute Truth, for the human form is rarely achieved by the soul.
The ultimate goal of existence is to seek Krishna, God, the Supreme Person, in order to renew the bond with Him, to develop pure love for Him, and to go to Him in His wonderful, eternal, absolute and infinite kingdom.