As Jesus went on from there, he saw a man named Matthew sitting at the tax collector’s booth. “Follow me,” he told him, and Matthew got up and followed him. While Jesus was having dinner at Matthew’s house, many tax collectors and sinners came and ate with him and his disciples. When the Pharisees saw this, they asked his disciples, “Why does your teacher eat with tax collectors and sinners?” On hearing this, Jesus said, “It is not the healthy who need a doctor, but the sick. But go and learn what this means: ‘I desire mercy, not sacrifice.’ For I have not come to call the righteous, but sinners.”
Matthew ws just like you and me; he made mistakes, he made bad choices and he ws lost in a consumer driven culture. And Jesus him to be one of the disciples, one of the closest companions. What more persuasion do you need that you're good enough and value enough to be a disciple yourself?