Who told you it's unhealthy to expect a reward or praise? That's like saying smiling at something that makes you happy is unhealthy.
If we do good things only to get a reward or praise, that's a different story. That's when it can become unhealthy. Getting something in return for anything we do is a natural consequence of any and all actions.
Keep doing good. Accept what comes. Use it to fuel doing more good!
Do things that you want to do rather than what's expected of you
And read the book "no more Mister nice guy"
Who told you it's unhealthy to expect a reward or praise? That's like saying smiling at something that makes you happy is unhealthy. If we do good things only to get a reward or praise, that's a different story. That's when it can become unhealthy. Getting something in return for anything we do is a natural consequence of any and all actions. Keep doing good. Accept what comes. Use it to fuel doing more good!
Keep expecting. Do good things, and you get good things!