This is referred to as Cognitive Dissonance. This term is used when a person has two thoughts, emotions or behaviors that conflict with each other because they are different or opposite. This internal incongruence often causes concern, and to eliminate it one must choose one of the cognitions perceived.
Well he is a great student so he shouldnt worry. just keep doing what you can do. everybody cant be good at everything
He thought he could free slaves in the rebel states becuz he thought that if he frees slaves than there will be more men in his troops he could use those free slaves to increase the men.and he didn't free slaves in the union part becuz people are already getting mad at him. the reason for this is that all the free slaves are going to take the white peoples jobs in the union.and Abraham didn't want the unions to be more mad at him and eventually go against him