The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all.

Abstraction is not just about hiding details; it's about creating a clear and concise model of the problem domain.

向更清洁能源的过渡是不可避免的，我们必须站在这一变革的最前沿。

You have to reject one expression of the human condition before you get to the music.

Ingersoll's story of the man that went down from heaven on a reduced-rate excursion ticket good for 30 days --- and tried to sell his return ticket.