If you simply try to understand Krsna — why Krsna advents Himself, why does He come, why does He disappear, what are His activities, what is His philosophy, this is Krsna consciousness. If you simply try to understand Krsna, then the result will be tyaktva deham — after giving up this body, no more accepting. Then you stop your janma-mrtyu-jara-vyadhi [Bg. 13.9]. This is the science of Krsna consciousness.

From Srila Prabhupada’s lecture on Srimad-Bhagavatam 6.1.6 — Sydney, February 17, 1973