Along with the Deity worship in this temple, hold classes at least five hours. As in the schools and colleges there are regular classes, forty-five minutes' class, then five or ten minutes' recess, again forty-five minutes' class, in this way, so we have got enough subject matter to study, and if we study all these books, to finish them it will take at least twenty-five years. So you are all young men. I request you to engage your time in reading books, in chanting, in Deity worshiping, in going to preach, selling books. Don't be lazy. Always remain engaged. Then that is Krsna consciousness.
(Srila Prabhupada, Arrival Lecture — Mexico, February 11, 1975)