John Chrysostom

Therefore, let food, and bathing, and banqueting, and the other necessities of life have a definite time. But let instruction about the love of truth from above have no set hour—let all the time belong to it. "In season, out of season, reprove, entreat, rebuke," Scripture says. And the prophet, "On his law he will meditate day and night." And Moses too asked the Jews to do this continually.