君子以朋友讲习。
翻译:君子与朋友一起探讨学问。
The most exciting moments in mathematics are when you discover something that was hidden in plain sight.
You are never too old to set another goal or to dream a new dream.
We are what we think. All that we are arises with our thoughts. With our thoughts, we make the world.
It is common sense to take a method and try it. If it fails, admit it frankly and try another. But above all, try something.