At a very young age John Brown has always been religious. John Brown believed that God wanted him to end slavery. John Brown as a child also had been around slavery and seen what it had done to people, which would have affected him mentally.
At the raid in Harpers Ferry John Brown didn't want to harm anyone that wasn't affiliated with slavery. When John Brown went to Harpers Ferry and robbed the armory there was one guard there, they didn't kill him they just pointed a gun at him and made him step