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| It is a terrible thought, that nothing is ever forgotten; that not an oath is ever uttered that does not continue to vibrate through all times, in the wide spreading current of sound; that not a prayer is lisped, that its record is not to be found st | | William Cowper | |
| It seems to me that if you or I must choose between two courses of thought or action, we should remember our dying and try so to live that our death brings no pleasure on the world. | | John Steinbeck | |
| Learning without thought is labor lost; and thought without learning is perilous. | | Confucius | |
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| Men fear thought as they fear nothing else on earth -- more than ruin -- more even than death.... Thought is subversive and revolutionary, destructive and terrible, thought is merciless to privilege, established institutions, and comfortable habit. | | Bertrand Russell | |
| Most of the important things in the world have been accomplished by people who have kept on trying when there seemed to be no hope at all. | | Dale Carnegie | |
| One can only learn his powers of action by action, and his powers of thought by thinking | | John Burroughs | |
| One great use of words is to hide our thoughts | | Voltaire | |
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| The calmer thought is not always the right thought, just as the distant view is not always the truest view | | Nathaniel Hawthorne | |
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| The highest form of pure thought is in mathematics | | Plato | |
| The history of thought may be summed up in these words: it is absurd by what it seeks and great by what it finds | | Paul Valery | |
| The main thing in one's own private world is to try to laugh as much as you cry. | | Maya Angelou | |
| The man who never in his mind and thoughts travel'd to heaven is no artist. | | William Blake | |
| The only reason some people get lost in thought is because it's unfamiliar territory. | | Paul Fix | |
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| The secret thoughts of a man run over all things, holy, profane, clean, obscene, grave, and light, without shame or blame | | Thomas Hobbes | |
