The essence of mathematics lies in its freedom.
The truth is not always the best answer, but it is the only one that can set you free.
改变始于意识,但需要行动才能带来真正的改变。
做事情,不能有伤害别人的坏念头;但要有警惕他人、防备他人的念头。这是在告诫与人交往思考不周的人。