To do, or not to?

People always have the belief that one is only one, and our actions are too small, incapable of changing anything. Below is what Mahatma Ghandi had to say:

You have to do the right thing. It may not be in your power;
maybe not in your time, that there'll be any fruit.
But that doesn't mean you stop doing the right thing.
You may never know what results come from your action.
But if you do nothing, there will be no result...