If you loan someone $20 and you never see them again. That makes it worth $20. 

"We are all prisoners of our own desires."

Silence is the language of the soul.

The mathematician's patterns, like the painter's or the poet's, must be beautiful.

Every design is a rigorous attempt to capture a concrete moment in a continuous process.

我不害怕失败，我害怕不去尝试。