If we wanted to do, and it is a good thing. Do not place other people trouble We should do it because I do not know whether in the future, you will have the opportunity to do?
If we want to do anything And that's a good thing. Do not make others suffer We should do that, not knowing what the future will have the opportunity to do it.
If we want to do something, and that is good. Don't make others suffer. We should do something because you don't know what the future will have a chance to do?