There is only so much of fortune a man really needs and the rest is just for showing off.
悠闲自得,是出于专心勤奋;淡泊安适,是出于恭敬畏惧;无思无虑,是出于善于思考;胆大无畏,是出于小心翼翼。
A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between theories and the best mathematician can notice analogies between analogies.