Those who are not schooled and practised in truth [who are not honest and upright men] can never manage aright the government, nor yet can those who spend their lives as closet philosophers; because the former have no high purpose to guide their actions, while the latter keep aloof from public life.
We scientists, whose tragic destination has been to help in making the methods of annihilation more gruesome and more effective, must consider it our solemn and transcendent duty to do all in our power in preventing these weapons from being used for the brutal purpose for which they were invented.
The world is not looking for servants, there are plenty of these, but for masters, men who form their purposes and then carry them out, let the consequences be what they may.
It is proved...that things cannot be other than they are, for since everything was made for a purpose, it follows that everything is made for the best purpose.
Find the thing you want to do most intensely, make sure that’s it, and do it with all your might. If you live, well and good. If you die, well and good. Your purpose is done
I will never forget that the only reason I'm standing here today is because somebody, somewhere stood up for me when it was risky. Stood up when it was hard. Stood up when it wasn't popular. And because that somebody stood up, a few more stood up. And then a few thousand stood up. And then a few million stood up. And standing up, with courage and clear purpose, they somehow managed to change the world.