8 Kṛṣṇa Consciousness: the Topmost Yoga System
Kṛṣṇa as the Supreme Personality of Godhead, then, by the speeches that are delivered by Kṛṣṇa in the  Bhagavad-gītā , you can understand God. There is no difficulty.
And, if you believe Kṛṣṇa, then the result will be that you can understand God—how He is working, how His energies are acting, how He is manifesting, what is this material world, what is the spiritual world, what are the living creatures, what is their relationship—so many things are to be found in God’s literature.
The whole Vedic literature deals with three things: the first is your relationship with God; then, next, after you understand your relationship with God, you can act in that way. Just as a man or woman may not be related, but as soon as the relationship is established that one is husband and the other is wife, then the dealings begin.
Once they understand their relationship with God, people generally believe that God is the father, and the son’s business is to ask Father for whatever he needs. But that is really a lesser relationship. If you understand God perfectly, then there are intimate relationships also. Your intimate relationship will be revealed when you are perfectly liberated. Each and every living creature has a particular relationship with God, but we have, for now, forgotten. When that relationship is revealed in the process of devotional activities, or Kṛṣṇa consciousness, you will know that that is the perfection of your life. Kṛṣṇa consciousness is a great science; it is not a sentimental speculation regarding love. It is based on scientific propositions described in the  Bhagavad-gītā , in the  Vedas , and in the  Brahma-saṁhitā ; and it is accepted by authorities like Lord Caitanya, Rāmānujācārya, Madhvācārya, Nārada, Asita, Vyāsa—there are so many authorities. Kṛṣṇa consciousness is not an ordinary lovemaking or moneymaking business; it is reality, and if you stick to it seriously, your life will be perfect.