If you simply learn Srimad-Bhagavatam, you get so much knowledge how things are developing, how tongue is developing, how the taste is developing, how touch is developing, how fire is working, how heat is working; from the interaction of heat and touch, how things are devel… Everything is explained there. Physical and spiritual, everything is there. So this is bhagavata-dharma, to study Srimad-Bhagavatam very carefully. Every knowledge is there. Kim va parair isvarah [SB 1.1.2]. There is no need of reading any other book. Kim va paraih, in the beginning it is said. Why? Sadyo hrdy avarudhyate isvarah. The perfection of life is to understand God. So by reading Srimad-Bhagavatam, sadyah, immediately, hrdy avarudhyate isvarah: “The Supreme Personality of Godhead, by simply reading Bhagavatam… He is already there, but immediately He is realized.” That is the perfection of life.
From Srila Prabhupada’s lecture on Srimad-Bhagavatam 3.26.41 — January 16, 1975, Bombay