Matteo 8:4

And Jesus saith unto him, See thou tell no man, but go thy way, show thyself to the priest, and offer the gift that Moses commanded, for a testimony unto them.

Jesus was touched with compassion, Mark 1:41. His sympathy and willingness to help cause Him to stretch forth His hand and touch the leper, an intimate gesture showing complete understanding and begetting confidence. And His almighty "I will" quietly assumed the sovereign authority for a clear demonstration of unlimited power.

Not a mere pronouncing clean, as the rationalists will have it, but a miracle: The leprosy that had even now rendered the leper a hideous, misshapen travesty of God's creature disappeared at once, without delay. He was clean. Christ had reasons for avoiding a false popularity at this time. The people were wrought up to such a pitch of excitement on account of His teaching and because of His many miracles that they might have been prompted to hail Him, according to their false understanding of the Messianic kingdom, as their earthly king.

This would have excited the hatred of the Jewish leaders too early and caused suspicion and jealousy on the part of the government, all of which would have hindered His ministry. Besides, a premature spreading of the news might reach the ears of the priests before the leper actually presented himself, and their enmity might cause them to refuse a recognition of cleanness. And Jesus wanted to observe the precepts of the official religion.

Matthew 3:15. See to it, look you! He says: a prompt, decisive, though cordial command. Lose no time in unnecessary and useless conversation by the way; hurry is essential. Fulfill the injunctions prescribed in your case, Leviticus 14:10-32; sacrifice the gift which the Law demands, get a clean bill of health from the constituted authorities.

This would be a testimony, not only for the legalists, but also or all men. In this way might the former leper spread the news of the miracle properly, as he probably also did, Mark 1:45.