When the solution is simple, God is answering.
Love is a better teacher than duty.
Put your hand on a hot stove for a minute and it seems like an hour. Sit with a pretty girl for an hour, and it seems like a minute.
Intellectuals solve problems, geniuses prevent them.
When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That’s relativity.
If A is a success in life, then A equals x plus y plus z. Work is x; y is play; and z is keeping your mouth shut
The only thing that interferes with my learning is my education.
As far as the laws of mathematics refer to reality, they are not certain, and as far as they are certain, they do not refer to reality.
If you are out to describe the truth, leave elegance to the tailor.
Coincidence is God’s way of remaining anonymous.
In theory, theory and practice are the same. In practice, they are not.
If I had only known, I would have been a locksmith.
Make everything as simple as possible, but not simpler.
Common sense is the collection of prejudices acquired by age eighteen.
Only two things are infinite, the universe and human stupidity, and I’m not sure about the former.
The difference between stupidity and genius is that genius has its limits.
Men marry women with the hope they will never change. Women marry men with the hope they will change. Invariably they are both disappointed.
I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.
Any man who can drive safely while kissing a pretty girl is simply not giving the kiss the attention it deserves.
Imagination is vastly more important than intelligence.