The essence of mathematics lies in its freedom.
我相信自己和我的能力。
如果你愿意，我们可以回到那个山洞。
In itself, homosexuality is as limiting as heterosexuality: the ideal should be to be capable of loving a woman or a man; either, a human being, without feeling fear, restraint, or obligation.
心理学的方法必须严格经验化。
你不能让恐惧阻止你过自己的生活。
The greatest risk in agriculture is not taking any risks at all.
