性者，天质之朴也；善者，王教之化也。
人的本性是天生的质朴；善良是王道教化的结果。
You get what you give. What you put into things is what you get out of them.
Mental processes are tools for mastering the environment.
"When you do something best in life, you don’t really want to give that up – and for me it’s tennis."