Forty-Five Things I Learned in the Gulag, by Varlam Shalamov
Nr. 30:
I discovered that the world should be divided not into good and bad people but into cowards and non-cowards. Ninety-five percent of cowards are capable of the vilest things, lethal things, at the mildest threat.
https://www.theparisreview.org/blog/2018/06/12/forty-five-things-i-learned-in-the-gulag/