对于我来说，爱乃头等要务。我唯一的事，是爱这个世界。
For me, love is the foremost task. My sole purpose is to love this world.
最糟糕的监狱不是有墙和栏杆的监狱，而是我们思想中的监狱。
Psychology must be a science of facts, not theories.
We teach a subject not to produce little living libraries on that subject, but rather to get a student to think mathematically for himself.
The man who lets a leader prescribe his course is a wreck being towed to the scrap heap.