If there's more that you can do, then do it. If there's not...

If there's more that you can do, then do it. If there's not more that you can do, then be content with what you're doing. But if there is despair, the despair can only be that you can do more. Because when you're doing as much as you can do, you will not feel despair. Because despair is the gap between what you could be doing and what you are doing.