Gene feels power when he trains with Finny.
He begins to push himself further and further until he is able to go well past what he was once able to do.
What is the context it's in?
Well the ability of man is based on if you believe in him or not. If you don’t believe in his then the ability of man will no longer be the ability. What makes the ability of man so important is that he is there or prayers and not for fun, you need his help when your stressed or need to pray for your times.
Bandwagon is the logical fallacy in English in which writers use to try to persuade their readers to agree with their opinion using argumentative fallacies. In specific Band wagon is saying," Everyone is doing it so why aren't you?"
For example everyone is trying new grape toothpaste why aren't you?
They are using the logical fallacy to get you to 'get on the wagon' and 'be like everyone else'.
Hope this helps! If you need anymore help or further explanation just let me know!! :)