Will, I think is the operative term you are looking for.
Motivation is for dogs or chattel. Will is for Man (whoever she is.)
You are also limited by Objective Reality, or “ultimate Truth” though you can get by pretty well with an average error rate as long as you have civilization smoothing out the survival interface.
Are you looking for meaning? Don’t be a waste.
Prosperity? Good living is a form of prosperity. Live well.
Looking for higher purpose? Something more than your idle monotonous potential of being? Awaken.
A challenge? There are many.
The difficulty is not in finding truths, the difficulty lies in undeceiving the self.
Look for worthy purpose, undeceive yourself, live well, don’t be a waste.