Courage is not the absence of fear, but the triumph over it.

Mathematics is a collaborative endeavor. No one does it alone.

The writer must be a perpetual outsider, a critic of all orthodoxies.

广东话谚语

"The world breaks everyone, and afterward, many are strong at the broken places."

你需要耐心、自律和敏捷，才能承受损失和逆境而不发疯。