I am a one-trick pony. But I have worked hard at something I would have liked to do even if I weren't paid a penny for it, and made a good living at it. You can't be luckier than that in this life, no matter who you are or what you do.
Unfaithfulness ought to extinguish love, and we should not be jealous when there is reason to be. Only those who give no grounds for jealousy are worthy of it.