If you can’t tell what you desperately need， it’s probably sleep.

译文：人情世故就像流水一样有高下之别，世事就像白云一样卷起展开，变化无常。赏析：我们在社会上立足，总会遇到这样或那样的糟心事和烦心人，但和生命健康比起来，这些不算什么。世事无常，人情淡薄，我们顺其自然即可。

The successful trader has to fight two powerful enemies: the market and himself.

If you can't explain it simply, you don't understand it well enough.