Man is a strange animal. He generally cannot read the handwriting on the wall until his back is up against it.

Man is a strange animal. He generally cannot read the handwriting on the wall until his back is up against it.

人是一种奇怪的动物。他通常只有背靠着墙壁才能看清墙上的字迹。

-- Adlai E. Stevenson II 阿德莱·史蒂文森二世