一切人类知识都源于经验。
All human knowledge is from experience.
The computer is the first metamedium, and as such it has degrees of freedom for representation and expression never before encountered.
You want to be extra rigorous about making the best possible thing you can.
人类的选择在于自由和幸福之间，而对于大多数人来说，幸福更好。
如果你用行为主义的方式养育孩子，让他们无所畏惧，世界就会改变。
A verdadeira revolução é a que transforma o coração do homem.