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| The older I grow the more I distrust the familiar doctrine that age brings wisdom. | | Henry Louis Mencken | |
| The plainest sign of wisdom is a continual cheerfulness: her state is like that of things in the regions above the moon, always clear and serene | | Michel de Montaigne | |
| The possession of anything begins in the mind | | Bruce Lee | |
| The price of wisdom is above rubies | | Bible | |
| The rod and reproof give wisdom; but a child left to himself bringeth his mother to shame | | Bible | |
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| The teacher who is indeed wise does not bid you to enter the house of his wisdom but rather leads you to the threshold of your mind. | | Kahlil Gibran | |
| The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts. | | Bertrand Russell | |
| The wisdom of the wise and the experience of the ages are perpetuated by quotations. | | Benjamin Disraeli | |
| The wisdom of the wise and the experience of the ages, may be preserved through quotations | | Benjamin Disraeli | |
| The wise are doubtful. | | Plato | |
| The wise know too well their weakness to assume infallibility; and he who knows most, knows best how little he knows | | Thomas Jefferson | |
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| The wise man does not expose himself needlessly to danger, since there are few things for which he cares sufficiently; but he is willing, in great crises, to give even his life - knowing that under certain conditions it is not worth-while to live | | Aristotle | |
| The wise man thinks about his troubles only when there is some purpose in doing so; at other times he thinks about other things | | Bertrand Russell | |
| The wisest have the most authority | | Plato | |
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