Letting go of the past is all you have to do. No longer try to hold on to what you no longer serve. The dust behind you will drop until it is waiting to be raised again by the next seeker. Nothing stays the same, for nobody, why should it be different for you. Therefore, get up again and walk on, go on with your life and do not continue to grieve. Allow yourself to feel sadness, but also see the relief as a moment to move on.