Never do anything against conscience even if the state demands it.
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
Knowledge is dead; the school, however, serves the living.
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.
The only thing that interferes with my learning is my education.
I see a pattern, but my imagination cannot picture the maker of that pattern. I see a clock, but I cannot envision the clockmaker. The human mind is unable to conceive of the four dimensions, so how can it conceive of a God, before whom a thousand years and a thousand dimensions are as one?
If you are out to describe the truth, leave elegance to the tailor.
If I had only known, I would have been a locksmith.
Common sense is the collection of prejudices acquired by age eighteen.
Make everything as simple as possible, but not simpler.
Academic chairs are many, but wise and noble teachers are few; lecture-rooms are numerous and large, but the number of young people who genuinely thirst after truth and justice is small. Numerous are the academic professors, but rare are wise and noble teachers.
Only two things are infinite, the universe and human stupidity, and I’m not sure about the former.
I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.
Men marry women with the hope they will never change. Women marry men with the hope they will change. Invariably they are both disappointed.
Any man who can drive safely while kissing a pretty girl is simply not giving the kiss the attention it deserves.
The difference between stupidity and genius is that genius has its limits.
Coincidence is God’s way of remaining anonymous.
The distinction between the past, present and future is only a stubbornly persistent illusion.
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.
Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.