-- whoever does the will of God, the same is Jesus' brother, sister, and mother --- Mark 3:35
-- my mother and brethren are these which hear the word of God and do it --- Luke 8:21
-- whoever keeps his word, in him is the love of God perfected, hereby we know that we are in him --- 1 John 2:5

Mark 3:31-35 KJV
[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. [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.

Luke 8:19-21 KJV
[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. [21] And he answered and said unto them, My mother and my brethren are these which hear the word of God, and do it.

1 John 2:5 KJV
[5] But whoso keepeth his word, in him verily is the love of God perfected: hereby know we that we are in him.

Your belief and faith in Jesus will change your life.

Your changed life will be evidence of your belief and faith in Jesus.

2 Corinthians 5:17 KJV
[17] Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new.