Russian writer Varlam Shalamov spent 15 years, from 1937 to 1951, in a Soviet gulag (forced labor camp) for engaging in “counter-revolutionary Trotskyist activities”. He wrote a book of short fiction about his experience called Kolyma Stories. He also wrote down 45 things he learned while in the gulag.
1. The extreme fragility of human culture, civilization. A man becomes a beast in three weeks, given heavy labor, cold, hunger, and beatings.
15. I realized that one can live on anger.