Heredity is nothing, environment is everything.
There is no greater sorrow than to recall happiness in times of misery.
"The power of words lies not in their complexity, but in their ability to touch the heart."
The best investment is in yourself.
我很高兴活着，我很高兴成为我自己。
No society can surely be flourishing and happy， of which the far greater part of the members are poor and miserable.
"Mathematics is not a spectator sport."