The mind once enlightened cannot again become dark.
悲伤不是线性的过程。它像波浪一样袭来,有时那些波浪会把你击倒。
You are the only real obstacle in your path to a fulfilling life.
能量守恒定律不仅仅是一个抽象原则;它是已被无数实验验证的自然法则。
人们都认为自己是对的。