I have not built a business, but I have done difficult things.
When I was working hard at school, at projects, at selling, I started to realize that if it is not something you believe in, well that makes it difficult.
I also spoke to many influential humanitarians who had a lot of money. I know there are people who do things for show, but there are a few that I have gotten to know personally and I believe them: impact, legacy, positive contribution is what they really want to accomplish.
That is what gets them up in the morning.
Without those drives, then things become difficult.