Don’t part with your illusions. When they are gone you may still exist, but you have ceased to live.Mark Twain 不要放弃你的幻想。当幻想没有了以后，你还可以生存，但是你虽生犹死。
Man errs so long as strives.Johann Wolfgang Goethe,German poet and dramatist 人只要奋斗就会犯错误。
Where there is a will, there is a way.Thomas Edison 有志者，事竟成。
Character cannot be developed in ease and quiet. Only through experience of trial and suffering can the soul be strengthened, vision cleared, ambition inspired, and success achieved.Helen Keller 要使性格有所发展并非简单之事，只有通过艰难和困苦的磨练才能使心灵强化，视野开阔，雄心振奋，从而达到成功的目的。
Virtue is bold, and goodness never fearful.William Shakespeare 美德是勇敢的，善良从来无所畏惧。
Histories make men wise; poems witty; the mathematics subtle; natural philosophy deep; moral grave; logic and rhetoric able to contend.Francis Bacon 历史使人明智；诗词使人灵秀；数学使人周密；自然哲学使人深邃；伦理使人庄重；逻辑修辞学使人善辩。
Never too old to learn.Thomas Middleton, British writer 活到老学到老。
The more you study, the more you will find yourself ignorant.Rene Descartes, French philosopher/mathematician 学，然后知不足。
All happy families are like one another; each unhappy family is unhappy in its own way.Leo Tolstoy, Russian writer 所有幸福的家庭都十分相似；而每个不幸的家庭各有自不幸。
Experience is the father of wisdom and memory the mother.Charles BernardFrench philosopher 经验是智慧之父，记忆是智慧之母。
Knowledge is power.Francis Bacon 知识就是力量。
Experience is not what happens to a man; it is what a man does with what happens to him.Aldous Leonard HuxleyAmerican writer 经验不会从天降；经验只有通过实践才能获得。
I disapprove of what you say, but I will defend to the death your right to say it.Voltaire, French writer 我不同意你说的话，但是我愿意誓死捍卫你说话的权利。
Plato is dear to me, but dearer still is truth.Aristotle, Ancient Greek philosopher 吾爱吾师，吾更爱真理。
Imagination is more important than knowledge.Albert Einstein 想象力比知识更为重要。
Do not, for one repulse, give up the purpose that you resolved to effect.William Shakespeare 不要只因一次失败，就放弃你原来决心想达到的目的。
I want to bring out the secrets of nature and apply them for the happiness of man. I don’t know of any better service to offer for the short time we are in the world.Thomas Edison 我想揭示大自然的秘密，用来造福人类。认为，在我们的短暂一生中，最好的贡献莫过于此了。
It is at our mother’s knee that we acquire our noblest and truest and highest ideals, but there is seldom any money in them.Mark Twain