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| A man’s folly is his worst foe and his discretion his best friend. | 1 |
| A man’s folly ought to be his greatest secret. | 2 |
| Among other evils folly has also this: it is always beginning to live. Seneca. | 3 |
| Folly and learning oft dwell together. | 4 |
| Folly as well as wisdom is justified by its children. | 5 |
| Folly hath eagle wings, but the eyes of an owl. Dutch. | 6 |
| Folly is the most incurable of maladies. Spanish. | 7 |
| Folly is the poverty of the mind. | 8 |
| Folly is the product of all countries and all ages. | 9 |
| Folly often goes beyond its bounds, but impudence knows none. Ben Jonson. | 10 |
| If a man have folly in his sleeve it is sure to peep out. Danish. | 11 |
| It folly were a pain, there would be groaning in every house. Spanish. | 12 |
| If we will have the kindness of others we must endure their follies. Dr. Johnson. | 13 |
| It is folly to drown on dry land. | 14 |
| It is folly to gape against an oven. French, Danish. | 15 |
| It is folly to lay out money in the purchase of repentance. Franklin. | 16 |
| It is folly to sing twice to a deaf man. | 17 |
| It is folly to fear what we cannot avoid. Danish. | 18 |
| It is the ordinary way of the world to keep folly at the helm and wisdom under the hatches. | 19 |
| It is well to profit by the folly of others. Latin. | 20 |
| Mingle a little folly with your wisdom. Horace. | 21 |
| Natural folly is bad enough, but learned folly is intolerable. | 22 |
| Nobody so wise but has a little folly to spare. German. | 23 |
| No folly to being in love. Welsh. | 24 |
| Purposing without performing is mere folly. | 25 |
| The amity which wisdom uniteth not, folly will unite. | 26 |
| The desire for the superfluous is folly, for it hath no bounds. Pythagoras. | 27 |
| The first degree of folly is to think one’s self wise, the next to tell others so, the third to despise all counsel. | 28 |
| The follies of youth are food for repentance in old age. | 29 |
| The folly of one man is the fortune of another. | 30 |
| The malady that is most incurable is folly. Portuguese. | 31 |
| The most exquisite folly is made of wisdom too fine spun. | 32 |
| The shortest follies are the best. French. | 33 |
| To counsel and to disregard his own safety is folly. Phædrus. | 34 |
| Whoever falls sick of folly is long in getting cured. Spanish. | 35 |
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