There are times in life that we may be tempted to look around us and see how miserable people are, this my tempt us to be contempt and boastful. But the bible says we should not boast about our future since we have no clue of what is coming ahead.
The bible also said we were created and kept alive so we can help other people around us. We should try to help as many people as possible because we do not know tomorrow, these people we help today may be in the position to help us or our children tomorrow.
So do not dwell on the past because it can not be changed, do not dwell on the future because you will never be certain of what is coming. Just concentrate on your present and live it to the fullest. Make every minuit count and help as many people as possible, you will receive your reward in heaven.