He didn't come for the Pharisees, so were so certain that they were perfect. He knew that their over-confidence in their own beliefs and rules made them pretty much a lost cause. And so he focussed on those who really needed his help.
The woman at the well. No one else would associate with her. She was such an outcast that she often chose to get her water in the heat of the day, when no one else would be at the well because it was probably better to suffer the heat than the judgement of all the other townspeople.
The man with leprosy. No one would touch him, except for Jesus.
The unclean woman, who for 12 years was kept separated from all of those in her family because of a physical disease that no one else could heal but Jesus.
All those people that had been cast out because they were so far "below" everyone else. He came for THEM.
The Bible quite often uses people who are looked down upon, who aren't considered as "good" as others, to do great things.
So maybe the next time you look down on that person in the pew across from you, or on that street corner, begging for a meal, you should try to remember all the people who came before you. The "least", and remember that God has a funny way of raising them up so much higher than you could ever imagine.
And if you ever feel like one of the "least", please, please, please do not let that become who you think you are. All of those people knew that with God, anything was possible. And they have gone down in history as powerful, life changing, admirable people.