The goal of mathematics is not to solve problems, but to understand them.
数学的目标不是解决问题，而是理解问题。
The only thing that can make you a success is your hard work.
The men who learn endurance, are they who call the whole world, brother.
Change your conception of yourself and you will change your world.
"Sometimes the hardest journeys are the ones that take you back to yourself."
"Die Sprache ist das Haus des Seins."