- Albert Einstein
- Everything should be made as simple as possible, but not simpler.
- If you can’t explain it simply, you don’t understand it well enough.
- A person who never made a mistake never tried anything new.
- Polya George
- Mathematics is the cheapest science. Unlike physics or chemistry, it does not require any expensive equipment. All one needs for mathematics is a pencil and paper
- If you can’t solve a problem, then there is an easier problem you can solve: find it.