此生不学一可惜，此日闲过二可惜，此身一败三可惜。
人一生不学习，一天闲过，一事无成，这是人生三件可惜事。
Man is by nature a reasonable being, but animals, other than man, are by nature instruments of brute force.
数学是为不同事物赋予相同名称的艺术。
Art should be a space for possibility.
The world is what it is; men who are nothing, who allow themselves to become nothing, have no place in it.