Men are disturbed not by things but their views of things.
- Epictetus (55–135)
- 埃比克德都斯(古羅馬)

Whenever, therefore, people are deceived and form opinions wide of the truth, it is clear that the error has slid into their minds through the medium of certain resemblances to that truth.
- Socrates (469-399 B.C.)

- 蘇格拉底(古希臘)

He who is of a calm and happy nature will hardly feel the pressure of age, but to him who is of an opposite disposition youth and age are equally a burden.
- Plato (427-347 B.C.)

The search for happiness is one of the chief sources of unhappiness.
- Eric Hoffer (1902–83)

You may have enemies whom you hate, but not enemies whom you despise. You must be proud of your enemy: then the success of your enemy shall be your success too.
- Friedrich Nietzsche (1844–1900)
- 尼采(德國)

When one is frightened of the truth . . . then it is never the whole truth that one has an inkling of.
- Ludwig Wittgenstein (1889–1951)
- 維根斯坦(英/德國)

There is but one truly serious philosophical problem and that is suicide. Judging whether life is or is not worth living amounts to answering the fundamental question of philosophy.
- Albert Camus (1913–60)
- 卡繆(法國)

Does life have meaning? Are there objective ethical truths? Do we have free will? What is the nature of our identity as selves? Must our knowledge and understanding stay within fixed limits? These questions moved me, and others, to enter the study of philosophy. I care what their answers are. While such other philosophical intricacies as whether sets or numbers exist can be fun for a time, they do not make us tremble.
- Robert Nozick (1938-2002)
人生有意義嗎?有客觀的倫理事實嗎?我們的意志自由嗎?甚麼是我們自我身分的本質?我們的知識及理解必須停留在一個固定的界限媔隉H這些問題鼓動了我及其 他人進入哲學的研究。我關心這些問題的答案是甚麼。有一些艱難的哲學問題,諸如:數學中的集或數字是否真的存在?可能在一段時間媟|顯得很有趣,卻不會使 我們顫抖。
- 諾錫克(美國)