没有改变就不可能进步，而无法改变思想的人也无法改变任何事。
The great question which, in all ages, has disturbed mankind, and brought on them the greatest part of their mischiefs, has been, not whether there be power in the world, nor whence it came, but who should have it.
The true potential of technology lies in its ability to empower individuals and communities.
The more you sweat in peace, the less you bleed in war.
你无法改变过去，但你可以塑造未来。
It seems to me that if you or I must choose between two courses of thought or action, we should remember our dying and try so to live that our death brings no pleasure to the world.