The claim that everybody sees the world differently is not a claim that there's no reality. It's a different kind of claim.
So let God know what you're doing just by doing it - or feel good about yourself. But don't rely on men and women to inspire you to do good - because we will probably often fail you with our own imperfections! We all should be trying to improve ourselves, regardless of how much better off or worse off we are than the person next to us, because we can all get better.