I was entirely natural and in many ways I have the same attitude now. I don't mourn the loss of my youth because I believe you should enjoy what you have while you have it.
Human history in essence is the history of ideas.
Once the command of the air is obtained by one of the contending armies the...
If we don't end war war will end us.
Heresies are experiments in man's unsatisfied search for truth.
There is no reason to repeat bad history.
There were various turning points, but the main one at the beginning was...
Look into the heavens and say, “It’s my turn to make history.