You don't have to be a billionaire to believe you can make a difference. Give your resources to a charity and volunteer in your community.
The greatest reward for your actions is not the respect you gain from others but the respect you gain for yourself.
Progress has a steep price. Success has an even steeper price. Your team won't be willing to pay it if you aren't willing to pay it.
Trying hard and working hard is its own reward. It feeds the soul. It affirms your will and your power. And it radiates from you, lighting the way for all those who see you.