Friend and Brother

There are "friends" who destroy each other, but a real friend sticks closer than a brother.
Proverbs 18 v 24

So now Jesus and the ones He makes holy have the same Father. That is why Jesus is not ashamed to call them His brothers. 
Hebrews 2v 11

Jesus replied "Who is My mother? Who are My brothers? Then He looked at those around Him and said," Look, these are My mother and brothers. Anyone who does  God's will is My brother and sister and mother. "
Mark 3 v 34, 35