Believe that you are a powerful child of Spirit.

Was he a wizard, a shaman, a simple hiker with a walking stick?  The man stood on the precipice looking out over a valley that seemed to go on forever.  He stood there a long time fighting with the demons in his mind that told him he was no good, nothing, and had accomplished nothing.  As the twilight deepened he cried out to God.  “Give me a sign, somehow let me know I am more than this mere worthless human.”
And he heard a reply.    “My child, strike your staff down on the rock and watch.  You will have your sign.”
Hardly believing that he had actually heard anything but the wind, he raised his hand, and brought the staff down on the rock, striking the tip hard on the rock shelf he stood on.
A bright shaft of light shot up out of the top of the staff and connected him to the sky.   But even as his own staff became a stream of light, suddenly, individual shafts of light began streaming up from the valley, as far as the eye could see.  Great columns of light filled the valley around and in front of him.  
“My child, do you see all the columns of light around you?   Those are the lights of all of the people that you have touched in one way or another.   Believe that you are a powerful child of Spirit.   Your intentions have been good and without knowing it you have spread much light in the world.    This then is my sign to you.  Your light is seen and known and has touched many.     No longer despair.”
Slowly the column of light from his staff faded and one by one the lights in the valley around faded, leaving a glow that filled the evening.   His heart filled with joy, the man lingered, savoring the feelings and the memory of those lights and knowing that when he returned to the valley he would be ready to go on.