17 Iron is sharpened by iron: so doth a man sharpen himself on the countenance of his friend.

9 Two are better than one; because they will have a good reward for their toil.10 For if they fall, the one will lift up his fellow; but woe to the single one that falleth; for he hath no companion to lift him up.11 Also, if two lie together, then will they become warm; but how can one person alone become warm?12 And if a man could overpower him, the single one, two would stand up against him: and a threefold cord cannot quickly be torn asunder.