A sample of the bad side, a person or case that tells you that it shouldn’t happen when you look at it. People and cases that can be a source of reflection by seeing it. Japanese calls Han-Men-Kyou-Shi. > profound knowledge for life stocks 漢字 反面教師 はんめんきょうし
developing new ideas based on study of the past, learning from the past. Study the old things and discover new knowledge and reason from them. Japanese calls On-Ko-Chi-Shin. > profound knowledge stocks おんこちしん 漢字 四字熟語 温故知新
A weak one is a sacrifice of a strong one. The one with strong power wins and prospers. Japanese says “Jaku Niku Kyo Shoku”. > profound knowledge for life stocks じゃくにくきょうしょく 漢字 四字熟語