When you have exhausted all possibilities, remember this - you haven't.

It is astonishing what an effort it seems to be for many people to put their brains definitely and systematically to work.

I try not to invent things that people don't need.

When I have eliminated the ways that will not work, I will find the way that will work.

I do not believe any type of religion should ever be introduced into the public schools of the United States.

To me, the idea and expectation that the day is slowly and surely coming when we will be able to honestly say we are our brother's keeper and not his oppressor is very beautiful .

Most of the exercise I get is from standing and walking around laboratory tables all day. I derive more benefit and entertainment from this than some of my friends and competitors get from playing games like golf.