Self defence

みんなそれぞれ弱点はある。それを悟られない方が人間関係も有利だったりするのだろう。

Everyone has their own weaknesses. If you don't realize it, your relationships may be advantageous.

世間は冷たいと思っていた方が失望せず準備が出来たり、感謝を感じやすくなるとも思う。

I think it's easier for people who think the world is cold to be ready and grateful without being disappointed.

小さな幸せで充分ではないか。汚い言葉をわざわざ誰かに向けるより。

Isn't little happiness enough? Rather than directing dirty words to someone.