I Believe, but I Don't Believe.

In the christian experience, faith and unbelief ae simultaneous realities. They actually happen at the same time. The one who believes is always concurrently involved in a battle against unbelief. Unbelief always creeps in. So this dad pleads for help, as he is a doubter. He's the only one in the story, to confess his weakness. Even the disciples, when they left, are like, ha, why couldn't we do that?