[31] Then he took unto him the twelve, and said unto them, Behold, we go up to Jerusalem, and all things that are written by the prophets concerning the Son of man shall be accomplished. [32] For he shall be delivered unto the Gentiles, and shall be mocked, and spitefully entreated, and spitted on: [33] And they shall scourge him, and put him to death: and the third day he shall rise again. [34] And they understood none of these things: and this saying was hid from them, neither knew they the things which were spoken. [35] And it came to pass, that as he was come nigh unto Jericho, a certain blind man sat by the way side begging: [36] And hearing the multitude pass by, he asked what it meant. [37] And they told him, that Jesus of Nazareth passeth by. [38] And he cried, saying, Jesus, thou Son of David, have mercy on me. [39] And they which went before rebuked him, that he should hold his peace: but he cried so much the more, Thou Son of David, have mercy on me. [40] And Jesus stood, and commanded him to be brought unto him: and when he was come near, he asked him, [41] Saying, What wilt thou that I shall do unto thee? And he said, Lord, that I may receive my sight. [42] And Jesus said unto him, Receive thy sight: thy faith hath saved thee. [43] And immediately he received his sight, and followed him, glorifying God: and all the people, when they saw it, gave praise unto God.

Jesus reminded his disciples of the things written about him in the scriptures of the Old Testament. He plainly told them that he would “delivered unto the Gentiles,” and “mocked, spit on, scourged and put to death.” Then he told them he would “rise again the third day.” The disciples did not understand these things. They were as blind men who could not see the “light” of truth.
Jesus then illustrates their condition through the means of an “acted parable.” He passes by a physically blind man who calls out to him as the “Son of David.” This man was told that Jesus of Nazareth was passing by and yet he called him the “Son of David” twice. This was not a coincidence. The blind man was claiming a promise given in the scriptures when he addressed Jesus this way. In 2 Chronicles 21:7 the Bible says: Howbeit the Lord would not destroy the House of David, because of the covenant that he had made with David, and as He promised to give a light to him and his sons forever.
The blind man wanted to see light more than anything. He was in total darkness. Jesus is the light of the world. John 8:12 Then spake Jesus again unto them, saying, I am the light of the world: he that followeth me shall not walk in darkness but shall have the light of life. By faith, the blind man believed that Jesus was the promised light and his faith in Him allowed Jesus to heal him. The “blind man” represents not only the disciples who could not understand the “light of truth” that Jesus had revealed to them, but all those in the world who have never seen the light of truth, but who are in spiritual darkness.