Quote by Sir John Vanbrugh
Virtue is its own reward. There's a pleasure in doing good which sufficiently pays itself.
This quote suggests that when one acts with virtue and does good deeds, the intrinsic satisfaction and joy derived from doing so is its own reward. It implies that the act of being virtuous and doing good is fulfilling in itself and does not require external recognition or tangible benefits. In other words, the pleasure and contentment that come from leading a virtuous life are enough to justify and fulfill one's actions.
Just as the largest library, badly arranged, is not so useful as a very moderate one that is well arranged, so the greatest amount of knowledge, if not elaborated by our own thoughts, is worth much less than a far smaller volume that has been abundantly and repeatedly thought over.