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| Let no one delay the study of philosophy while young nor weary of it when old | | Epicurus | |
| Men acquire a particular quality by constantly acting a particular way. You become just by performing just actions, temperate by performing temperate actions, brave by performing brave actions. | | Aristotle | |
| Morally, a philosopher who uses his professional competence for anything except a disinterested search for truth is guilty of a kind of treachery | | Bertrand Russell | |
| My advice to you is not to inquire why or whither, but just enjoy your ice cream while it's on your plate - that's my philosophy | | Thornton Wilder | |
| Neither one should hesitate about dedicating oneself to philosophy when young, nor should get tired of doing it when one's old, because no one is ever too young or too old to reach one's soul's healthy. | | Epicurus | |
| On the one hand, philosophy is to keep us thinking about things that we may come to know, and on the other hand to keep us modestly aware of how much that seems like knowledge isn't knowledge | | Bertrand Russell | |
| One cannot conceive anything so strange and so implausible that it has not already been said by one philosopher or another. | | Rene Descartes | |
| One of my favorite philosophical tenets is that people will agree with you only if they already agree with you. You do not change people's minds. | | Frank Zappa | |
| One's philosophy is not best expressed in words; it is expressed in the choices one makes ... and the choices we make are ultimately our responsibility. | | Eleanor Roosevelt | |
| Only the extremely ignorant or the extremely intelligent can resist change. | | Socrates | |
| Our intonations contain our philosophy of life, what each of us is constantly telling himself about things | | Marcel Proust | |
| Philosophers are as jealous as women; each wants a monopoly of praise | | George Santayana | |
| Philosophy is a battle against the bewitchment of our intelligence by means of language. | | Ludwig Wittgenstein | |
| Philosophy is an elegant thing, if anyone modestly meddles with it; but if they are conversant with it more than is becoming, it corrupts them. | | Plato | |
| Philosophy is an unusually ingenious attempt to think fallaciously | | Bertrand Russell | |
| Philosophy is at once the most sublime and the most trivial of human pursuits. | | William James | |
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| Philosophy is like trying to open a safe with a combination lock: each little adjustment of the dials seems to achieve nothing, only when everything is in place does the door open. | | Ludwig Wittgenstein | |
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| Philosophy is the highest music. | | Plato | |
