Face odd things fearlessly and their fearsomeness will disappear.

解释 ( paraphrase )
遇见怪异的事，不奇怪，不惊恐，怪异的事情也就自行败退了。
这条谚语告诉我们：怪异的事情都有它自身发展和消失的规律。见到那些怪异的现象，不必大惊小怪，不必理睬它，随它去好了。

This proverb tells us that alarming things have a way of developing and then dispersing. So, when faced with queer things, don’t pay too much attention to them, as they will disappear by themselves.

败：失败，也可作消除、解除。
      To fail; to dispel.

造句 ( example )
俗语说得好：见怪不怪,其怪自败。摆正心态吧,不要受别人的恶意影响,一如既往地做你的,完全不必将他的非议当一回事。