Imagination is more powerful than knowledge.
Common sense is the collection of prejudices acquired by age eighteen.
The most aggravating thing about the younger generation is that I no longer belong to it.
You never fail until you stop trying.
The unleashed power of the atom has changed everything except our thinking. Thus, we are drifting toward catastrophe beyond conception. We shall require a substantially new manner of thinking if mankind is to survive.
We can understand almost anything, but we can't understand how we understand.