The moment you doubt whether you can fly, you cease forever to be able to do it.

Quality is not a function; it is a discipline.

The old believe everything, the middle-aged suspect everything, the young know everything.

I’ve always been attracted to the idea of a voice that is absolutely authoritative and yet absolutely humble.

It is not the strength of the body that counts, but the strength of the spirit.

幸福的门户就在你内心。