Answering them, He said, “Who are My mother and My brothers?” Looking about at those who were sitting around Him, He said, “Behold My mother and My brothers! “For whoever does the will of God, he is My brother and sister and mother.” (Mk 3:33–35; NASV)
Jesus had just been told that his mother and brothers had come to see him. They wanted to talk to him about his actions because they knew something was going to happen to him if he kept on preaching and teaching the way he had been. But Jesus looked around at those with him; those who wanted to hear what he had to say; those who were there to be healed; those seeking something better than what they had, and he said, "Look around me, these are my mother and brothers! Whoever does the will of my God is my brother and sister and mother."
Those that do the will of the father are all related; we are all brothers and sisters. Jesus was making a bold statement here. On the one hand, we think he was hard-hearted and cruel by saying, "Who are my mother and brothers?" He knew they wanted him to stop doing what he had been doing; the fathers work. Then looking at the crowd around him he knew why he was there, they wanted him to continue, they wanted to hear from him, they wanted to be taught about the kingdom to come. These were his brother and sisters and mother.
Another interesting point is that Jesus is the one to mention "sisters." In that day, women were nothing but possessions, but Jesus places them right up there alongside men by saying that those who do the will of the father are his brothers and sisters. He openly accepts all to be part of his family and loves us as his brothers and sisters. Aren't you glad? I know I am, and it causes me to sing, "I'm so glad I'm apart of the family of God!"*
* Gloria Gaither | William J. Gaither © 1970 William J. Gaither, Inc. (Admin. by Gaither Copyright Management)