Jesus healed the man who was not in his right mind living naked out by the tombs, cutting himself. When Jesus healed the man, the people saw him dressed, speaking plainly and in his right mind.
The symbolism of being naked is that those who are naked are not protected and not covered by the robe of righteousness from Christ. They are open to the elements and to the evils of the world.
The man is cutting himself, which reveals his dishonor toward his body and his disrespect toward himself.
The fact that the man was not speaking plainly tells us that he was not fully in the Word and was not understanding the Word of God being spoken to him.
Not being in his right mind explains that the devil is taking hold of the mind God has given him. Not being plain in speech makes it clear that God is not in control of the man’s thoughts.
The man when he was healed served as an object lesson in and of himself. This man’s newfound ability to speak, his clothed body, his clear mind and his end to cutting made people realize that Jesus was at work. The man himself spread the word that Jesus had transformed him and that Jesus was his Savior. People came to believe in Jesus because of this man and what they had witnessed happening to him.