Prediction is very difficult, especially about the future.

Un libro es un mundo en sí mismo, un universo que se abre ante nuestros ojos.

You have to believe in yourself when no one else does.

The principles of conditioning apply equally to all species.

写作是一种理解世界的方式。它是一种在混乱中强加秩序的方式。

I have held many things in my hands, and I have lost them all; but whatever I have placed in God's hands, that I still possess.

If you wish to succeed, you should use perdistence as your good friend, experiece as your reference, prudence as your brother and hope as your sentry.

当目标是带来有意义的改变时，协作胜过竞争。