Wonder, and its expression in poetry and the arts, are among the most important things which seem to distinguish men from other animals, and intelligent and sensitive people from morons.
Tomorrow and plans for tomorrow can have no significance at all unless you are in full contact with the reality of the present, since it is in the present and only in the present that you live. There is no other reality than present reality, so that, even if one were to live for endless ages, to live for the future would be to miss the point everlastingly.
It's the action, not the fruit of the action, that's important. You have to do the right thing. It may not be in your power, may not be 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.
Let positive, strong, helpful thoughts enter into your brains from very childhood. Lay yourselves open to these thoughts, and not to weakening and paralysing ones.