Opportunity is missed by most people because it is dressed in overalls and looks like work.
To invent, you need a good imagination and a pile of junk.
Genius is one per cent inspiration, ninety-nine per cent perspiration.
Imagination is more important than knowledge...
It is the supreme art of the teacher to awaken joy in creative expression and knowledge.
There is no expedient to which a man will not go to avoid the labor of thinking.
We don't know a millionth of one percent about anything.
I wrote somewhere once that the third-rate mind was only happy when it was thinking with the majority, the second-rate mind was only happy when it was thinking with the minority, and the first-rate mind was only happy when it was thinking.
"when you are a Bear of Very Little Brain, and you Think of Things, you find sometimes that a Thing which seemed very Thingish inside you is quite different when it gets out into the open and has other people looking at it."