定理是永恒的;它们的证明是短暂的。
It is common sense to take a method and try it. If it fails, admit it frankly and try another. But above all, try something.
对梦的研究为潜意识提供了一个独特的窗口,揭示了我们可能没有意识到的欲望、恐惧和冲突。