It is literally true that you can succeed best and quickest by helping others to succeed. Napoleon Hill.
I cannot give you a formula for success, but I can give you the formula for failure – which is: try to please everybody. Herbert Bayard Swope
What we have done for ourselves alone dies with us; what we have done for others and the world remains and is immortal. Albert Pike
The world runs on individuals pursuing their self interests. Milton Friedman
We always underestimate the rate of technological change and overestimate the rate of social change. Gerard O’Neil