真正的喜悦精神、崇高感、超越人类的感觉，这是最高卓越的试金石，在数学中肯定能找到，就像在诗歌中一样。
The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.
Life is not easy for any of us. But what of that? We must have perseverance and above all confidence in ourselves. We must believe that we are gifted for something and that this thing must be attained.
The architecture of cognition constrains the forms of knowledge representation.
The secret to living is giving.
我表演不是为了逃避现实；我表演是为了理解它。
胜利很棒，但从失败中学习更重要。
How wonderful that we have met with a paradox. Now we have some hope of making progress.