The first lesson every young man learns upon entering the prison system is that aggression is king and violence is law. The traits that are valued in the real world -- honesty, generosity, friendliness -- are viewed as weaknesses in prison. Weaknesses that are pounced upon and exploited. Survival in this world depends on at least the perception of brutality and if you're not particularly brutal, you had better be a damn good actor.
So that's what I've been doing for the last 22 years. Acting. Acting tough, acting hard, acting cold. Acting as if I don't see the loneliness and sadness and brokenness that surrounds me. Why? Simple: Fear.