Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法的:它是关于理解的。
The proper study of psychology is not what the mind is, but what the mind does.
"The challenge of biography isn't finding the facts - it's finding the meaning behind them."
The way we see things is affected by what we know or what we believe.