We will sometimes have defeats in life but you can have defeats without being defeated, you could fail without being a failure. When you see failure and defeats as merely part of the process to get to when.
Though we may never be able to comprehend human life, we know certainly that it is a movement, of whatever nature it be. The existence of movement unavoidably implies a body which is being moved and a force which is moving it. Hence, wherever there is life, there is a mass moved by a force. All mass possesses inertia; all force tends to persist
Look not back. No, not even if you see the dearest and nearest cry. Look not back, but forward. We cannot stop. If we stop we die. We have either to go forward or to go backward. We have either to progress or to degenerate.
Try to learn to breathe deeply, really to taste food when you eat, and when you sleep, really to sleep. Try as much as possible to be wholly alive with all your might, and when you laugh, laugh like hell. And when you get angry, get good and angry. Try to be alive. You will be dead soon enough.