被大胆说出的预言,从来不会被迷信的人认为是愚笨无趣的。
Courtesy costs nothing. Lower the toilet seat after use. Let the people in the elevator exit before you enter. Return shopping carts to their designated areas. When you borrow something, return it better shape (filled up, cleaned) than when you got it.
The most important tool in science is not the microscope, but the mind.