In March of 1963, Martin Luther King was arrested for violating and injunction against marching in Birmingham Al. While in prison he wrote possibly his most famous justification of his cause. He had been criticized by ministers of rocking the boat and causing more harm than good. In his letters he spelled out that he had a higher calling to follow and that when man’s laws conflicted with God’s laws, he had the obligation to follow Gods law, even if that meant prison time for him.