We are all given one thing by which our lives are measured, one determination.

The world is always in movement.

To write history is to wrestle with ghosts.

领导力不是发号施令，而是激励他人实现他们认为不可能的事情。

为了对抗永恒的不公，人类必须伸张正义，为了对抗宇宙的悲伤，人类必须创造幸福。