A task for angels - Paulo Coelho

Many years ago lived a man who was able to love and forgive everyone he met.
Because of this, God sent an angel to talk to him.
“God asked me to come and visit you and to tell you that He wants to reward you for your goodness,” said the angel.
“Any favor that you desire will be granted. Would you like to have the gift of curing?”
“By no means,” answered the man. “I prefer that God Himself choose those to be cured.”
“And what about bringing sinners to the path of the Truth?”
“That is a task for angels like you. I don’t want to be venerated by anyone and serve as an example all my life.”
“I can’t go back to heaven without granting you a miracle. If you don’t pick one, you’ll be obliged to accept one.”
The man reflected a little before answering: “Then I want Good to be done through me, but without anyone noticing – not even myself, so that I don’t commit the sin of vanity.”
And the angel gave to that man’s shadow the power to cure, but only when the sun was shining on his face.
In that way, wherever he went, the sick were cured, the earth became fertile again, and sad people regained their joy.
The man traveled many years over the Earth without noticimg the miracles he worked, because when he was facing the sun, his shadow was always at his back.
In that way he could live and die without being aware of his own sanctity.