Simple can be harder than complex; you have to work hard to get your thinking clean to make it simple.
- Steve Jobs
If you thought that science was certain - well, that is just an error on your part.
- Richard Feynman
If you can't explain it simply, you don't understand it well enough.
- Albert Einstein
Intelligence is the ability to adapt to change.
- Stephen Hawking
Truth is ever to be found in simplicity, and not in the multiplicity and confusion of things.
- Sir Isaac Newton
To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.
- Nicolaus Copernicus
A man's friendships are one of the best measures of his worth.
- Charles Darwin