教育的艺术必须是引导孩子达到能够自我教育的程度。
The art of education must be to bring the child to the point where he can educate himself.
An expert is a person who has made all the mistakes that can be made in a very narrow field.
The habits of life form the soul, and the soul forms the countenance.
The function of entrepreneurs is to reform or revolutionize the pattern of production by exploiting an invention or, more generally, an untried technological possibility for producing a new commodity or producing an old one in a new way.
When power is scarce, a little of it is tempting.
The beauty of mathematics only shows itself to more patient followers.