Efficiency is highly overrated； Goofing off is highly underrated. Regularly scheduled sabbaths， sabbaticals， vacations， breaks， aimless walks and time off are essential for top performance of any kind. The best work ethic requires a good rest ethic.
You are always a valuable, worthwhile human being — not because anybody says so, not because you're successful, not because you make a lot of money — but because you decide to believe it and for no other reason.
In the quest for a unified theory, we must embrace the unknown and be willing to question our most cherished beliefs.
痛苦可以摧毀一個(gè)人，也可以塑造一個(gè)人。