27 And as Jesus passed on from there, two blind men followed him, crying aloud, "Have mercy on us, Son of David." 28 When he entered the house, the blind men came to him; and Jesus said to them, "Do you believe that I am able to do this?" They said to him, "Yes, Lord." 29 Then he touched their eyes, saying, "According to your faith be it done to you." 30 And their eyes were opened. And Jesus sternly charged them, "See that no one knows it." 31 But they went away and spread his fame through all that district.
Daily Quote from the early church fathers:
They saw because they believed in the Messiah, by Hilary of Poitiers (315-367 AD)
"At that point, two blind men follow the Lord as he was passing by. But if they could not see, how could the blind men know of the Lord's departure as well as his name? Moreover, they called him 'Son of David' and asked to be made well. In the two blind men, the entire earlier prefiguration [miracles in Matthew 9:18-26] is complete. The ruler's daughter seems to be from these people, namely, the Pharisees and John’s disciples, who already made common cause in testing the Lord. To these unknowing persons the law gave evidence as to the one from whom they sought a cure. It indicated to them that their Savior in the flesh was of the line of David. It also introduced light to the minds of those who were blind from past sins. They could not see Christ but were told about him. The Lord showed them that faith should not be expected as a result of health but health should be expected because of faith. The blind men saw because they believed; they did not believe because they saw. From this we understand that what is requested must be predicated on faith and that faith must not be exercised because of what has been obtained. If they should believe, he offers them sight. And he charges the believers to be silent, for it was exclusively the task of the apostles to preach." (excerpt from commentary ON MATTHEW 9.9)