Yes, a deep lesson from the postage stamp. It attaches itself to a moveable material, the envelope and gets going. A good relationship keeps you going forward; a bad one keeps you static. Attach yourself to someone who is also going forward and you will also get there.
Reconnect to what makes you happy and brings you Joy. If there is something that used to make you happy which you have stopped doing, do it again. Seek to find deeper meaning and significance rather than living on the surface.