Fool, not to know that love endures no tie, / And Jove but laughs at lovers' perjury. Dryden.
Fool of fortune. King Lear, iv. 6. 35
Fooled thou must be, though wisest of the wise; / Then be the fool of virtue, not of vice. Persian saying.
Foolish legislation is a rope of sand, which perishes in the twisting. Emerson.
Foolish people are a hundred times more averse to meet with wise people than wise people are to meet with foolish. Saadi.
Fools and bairns shouldna see things half done. Sc. Pr.
Fools and obstinate men make lawyers rich. 40 Pr.
Fools are apt to imitate only the defects of their betters. Swift.
Fools are aye fond o' flittin', and wise men o' sittin'. Sc. Pr.
Fools are aye seeing ferlies (wonderful things). Sc. Pr.