When he had come into the house, the blind men came to him.
Jesus said to them, "Do you believe that I am able to do this?"
They told him, "Yes, Lord."
Then he touched their eyes, saying,
"According to your faith be it done to you."
Their eyes were opened.
Jesus strictly charged them, saying,
"See that no one knows about this."
But they went out and spread abroad his fame in all that land.
What does this reveal about Jesus?
He can heal the blind
Seems like these blind men could see pretty well before they were healed of their blindness, for they recognized Christ as the Son of David and heir to the throne as the Messiah - the King of the Jews whose kingdom would be eternal.
It was not really their faith that healed them. Rather their faith qualified them to be healed. Just as it is not our faith that itself saves us, but that our faith qualifies us to be saved. The saving and healing is done by Jesus.
Another aspect of this is that they exercised a persistent faith. This is a quality of saving faith. For they had to following him all the way indoors - not so easy or convenient a task for blind men! So also at times Jesus delays responding to us, requiring us to follow Him first before answering us and healing us. (Seek and you shall find)
It should also be noted that many today who come to Christ to be saved go away with a reluctance to testify of what Jesus did for them. It seems quite common for Christians today to willingly submit to Jesus' command "See that no one knows about this." even though it's nor for them today, whereas Jesus himself couldn't get these blind men to shut up!
And why did he want them to be quiet? One reason could be so that he could get some sleep! And his ministry of teaching would be overrun by his healing ministry if he had too much advertisement. That's one idea anyhow. And there were times when he had even departed from the mob to spend time alone in prayer. Realize also that the purpose of his earthly ministry was not to heal everyone on earth at the time of all their particular problems, but to provide an appropriate witness of who he was in order to lead them to a greater and universal and permanent healing through the salvation he would provide in the future.