Jesus' question in Mark 10:51 "What do you want me to do for you?" is baffling. Jesus knows everything, moreover the man who is crying to him is obviously blind and needs healing. Why then this question; Jesus cannot be that dumb! The blind beggar in Jericho (Mark 10:46-52) was engaged in something demeaning. His name is mentioned in the Bible as Bartimaeus, which means son of honor. Though "a son of honor" he was doing the most dishonorable profession of begging in the city of Jericho. When Jesus met him he was begging. His style of begging (like all beggars do) is to catch people's attention by crying loud "have mercy on me" so that they can throw a coin in to his bowl. He did the same thing when Jesus passed by in the company of a large crowd. This time he did not just cry "have mercy on me" but was more specific because his plea was aimed at Jesus and not the crowd. He cries, "Jesus, Son of David, have mercy on me!" However...
“I don't know what I think until I write it down.” ― Joan Didion.