Jesus redefines his family

Mark 3:31 There came then his brethren and his mother, and, standing without, sent unto him, calling him. 32 And the multitude sat about him, and they said unto him, Behold, thy mother and thy brethren without seek for thee. Matt 12:46 While he yet talked to the people, behold, his mother and his brethren stood without, desiring to speak with him. 47 Then one said unto him, Behold, thy mother and thy brethren stand without, desiring to speak with thee. Luke 8:19 Then came to him his mother and his brethren, and could not come at him for the press. 20 And it was told him by certain which said, Thy mother and thy brethren stand without, desiring to see thee.
Mark 3:33 And he answered them, saying, Who is my mother, or my brethren? 34 And he looked round about on them which sat about him, and said, Behold my mother and my brethren! 35 For whosoever shall do the will of God, the same is my brother, and my sister, and mother. Matt 12:48 But he answered and said unto him that told him, Who is my mother? and who are my brethren? 49 And he stretched forth his hand toward his disciples, and said, Behold my mother and my brethren! 50 For whosoever shall do the will of my Father which is in heaven, the same is my brother, and sister, and mother. Luke 8:21 And he answered and said unto them, My mother and my brethren are these which hear the word of God, and do it.