Challenge yourself; it’s the only path which leads to growth.
Every job's a challenge. The challenge is to do it and make it look right, like you belong there - wherever that is.
The bigger point here is that golf is a good metaphor for one's life. The challenge of golf for me is trying to learn new rules. It's something you always have to work at; you don't get perfect at golf. It's the never-ending quest for betterment.