Answer:
so basically I think this person failed once but is saying that he shouldent be afraid to put all his hard work again because be has done this before and will do it better than before because he has experience.
An irrationally motivated arsonist is called a pyromaniac.
A pyromaniac is a person with a mental disorder who find happiness in setting things/people on fire with the aim to destroy/hurt/kill them. They will usually continue setting things on fire until they are apprehended because it brings them irrational joy.
The victory at Cowpens gave the Americans more confidence.
The battle win completely turned around the American morale and gave them a renewed sense of confidence that they could actually go on to win the American Revolutionary War.