笛卡尔：

我想，所以我有。

I think，therefore I am .

孔子：

学而不思则罔，思而不学则殆。学习谚语。

Learning without thought means labor lost; thought without learning is perilous.

爱因斯坦 Albert Einstein：

想像力比知识更重要。

Imagination is more important than knowledge.

毛泽东：

不怕做不到，就怕想不到。

What fears us is not we can't do but we can't think of it.

狄更斯

思想和身体一样，稍有过度的安逸，就会染病。

The mind, like the body, gets sick with excessive ease.

叔本华

一种纯粹靠读书学来的真理，与我们的关系，就像假肢、假牙、蜡鼻子甚或人工植皮。而由独立思考获得的真理就如我们天生的四肢：只有它们才属于我们。

A kind of truth, purely got through reading, is like an artificial limb, a false tooth, a wax nose, or a artificial skin graft. And the truth gained by independent thinking is like our natural limbs: only they belong to us.

拿破仑

世界上只有两种力量，一种是剑，一种是思想，而思想最终总是战胜剑。

There are only two kinds of power in the world, one is a sword, the other is thought, and the thought always always overcomes the sword.

柏拉图

思考是心灵同它自身的交谈。

Thinking is the conversation of the mind with itself.

高尔基

如果你的思想再也溅不起浪花,这会比死亡更可怕。

If your thoughts can no longer splash the waves, it will be more frightening than death.

《论语》

三思而后行。

Think before you act. (Look before you leap.)

《中庸》

博学之，审问之，慎思之，明辨之，笃行之。

Study extensively; Enquire accurately; Reflect carefully; Discriminate clearly; Practise earnestly.

“世界上很少有人不会沉思，只是常常不愿去沉思，思想的弦便因此生锈了。”

Few people in the world have no the ability of thinking, but they are often reluctant to contemplate, and the strings of ideas are rusty.

－End－