三人行，必有我师(焉)

成语
自怨自艾 self-blame, remorse, repentance
自私自利 selfish, self-centered
不减当年 just as good as once upon a time, not at all deteriorated
( ”pinyin” )

词汇
防, guard against; 防止, prevent; 预防, prevention ( ”pinyin” )
https://mandarinbean.com/new-hsk-3-word-list/

Guardian:
你在我这自怨自艾有用吗, what good does it do you to blame yourself in front of me?
原来人类才是最自私自利, humans have always been out for themselves
音容笑貌不减当年啊, looking just like he did in life
凭你一个人防得住吗，can you hold it off all on your own?

Me:
别那么自私自利了，想一下别人的感受。
不能防止所有的罪犯。