国有贤士而不用，非士之过，有国者之耻。——汉代桓宽。
国家有贤德之士而不任用，不是贤德之士的过失，而应该是拥有这个国家的君主的羞耻。
"The most important thing is to stay agile."
"The most thought-provoking thing in our thought-provoking time is that we are still not thinking."
The only thing I know is that I don't know anything.
The line between madness and genius is drawn by those who fear both.