Lord Kṛṣṇa is the source of all generations, and He is called the most efficient cause of everything. He says that because "everything is born of Me, I am the original source of all. Everything is under Me; no one is above Me." There is no supreme controller other than Kṛṣṇa. One who understands Kṛṣṇa in such a way from a bona fide spiritual master and from Vedic literature, who engages all his energy in Kṛṣṇa consciousness, becomes a truly learned man. In comparison to him, all others, who do not know Kṛṣṇa properly, are but fools. Only a fool would consider Kṛṣṇa to be an ordinary man. A Kṛṣṇa conscious person should not be bewildered by fools; he should avoid all unauthorized commentaries and interpretations on Bhagavad-gītā and proceed in Kṛṣṇa consciousness with determination and firmness.
Bhagvad gita, Chapter 10, Shloka 8 Purport (Excerpt)