By night an atheist half believes a God. Young.
By nothing do men more show what they are than by their appreciation of what is and what is not ridiculous. Goethe.
By others' faults wise men correct their own. Pr.
By persisting in your path, though you forfeit 10 the little, you gain the great. Emerson.
By pious heroic climbing of our own, not by arguing with our poor neighbours, wandering to right and left, do we at length reach the sanctuary—the victorious summit, and see with our own eyes. Carlyle.
By pride cometh contention. Bible.
By robbing Peter he paid Paul ... and hoped to catch larks if ever the heavens should fall. Rabelais.
By seeking and blundering we learn. Goethe.
By shallow rivers to whose falls / Melodious 15 birds sing madrigals. Marlowe.
By sports like these are all their cares beguil'd, / The sports of children satisfy the child. Goldsmith.