一位智者曾说：在你说话之前，让你的话经过三道门。在第一道门，问自己，“这是真的吗？”在第二道门，问，“这是必要的吗？”在第三道门，问，“这是善意的吗？”

心灵如同冰山，浮出水面的仅占七分之一。

"Emotion doesn't need elaborate explanation - sometimes a single brushstroke can convey it all."

Never underestimate the power of incremental improvements.

Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it.