The investor's chief problem—and even his worst enemy—is likely to be himself.

The person who tries to live alone will not succeed as a human being. His heart withers if it does not answer another heart. His mind shrinks away if he hears only the echoes of his own thoughts and finds no other inspiration.

出自先秦《荀子·修身》。利益少，但是道义多，这样的事要做。在利与义之间要舍利而取义，强调的是一种修身原则。

"Die Sprache ist das Haus des Seins."