The mind is everything. What you think you become.
I'm not perfect, but I'm trying every day to be better.
最好的科学发现往往发生在学科的边界上。
最好的报复就是巨大的成功。
The mind once enlightened cannot again become dark.
原始人与文明人在心智能力上的差异远小于他们在文化上的差异。