Richard Feynman

_{Science is what we do to keep from lying to ourselves}

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.

If you think you understand quantum mechanics you don't understand quantum mechanics 

I think it's much more interesting to live not knowing than to have answers which might be wrong.

Physics is like sex. Sure, it may give some practical results, but that's not why we do it.

The first principle is that you must not fool yourself - and you are the easiest to fool.