Mathematics is the art of turning complexity into clarity.
You cannot hope to build a better world without improving the individuals. To that end, each of us must work for our own improvement and, at the same time, share a general responsibility for all humanity, our particular duty being to aid those to whom we think we can be most useful.
"The best children's books are the ones that don't talk down to children."
I have learned to seek my happiness by limiting my desires, rather than in attempting to satisfy them.