There are admirable potentialities in every human being. Believe in your strength and your youth. Learn to repeat endlessly to yourself, 'It all depends on me.'
If you refuse to be made straight when you are green, you will not be made straight when you are dry.
An idea is salvation by imagination.
Reveal not every secret you have to a friend, for how can you tell but that friend may hereafter become an enemy. And bring not all mischief you are able to upon an enemy, for he may one day become your friend.
You create your opportunities by asking for them.
There is only one thing a philosopher can be relied upon to do, and that is to contradict other philosophers.
I'm all in favor of keeping dangerous weapons out of the hands of fools. Let's start with typewriters.