Are you Jesus's brother or mother ?

He replied (Jesus), "My mother and brothers are those who hear God's word and put it into practice." (Luke 8:21)

But he answered and said unto him that told him, Who is my mother? and who are my brethren?And he stretched forth his hand toward his disciples, and said, Behold my mother and my brethren!For whosoever shall do the will of my Father which is in heaven, the same is my brother, and sister, and mother. (Matthew 12:48-50)

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Shall we conclude from the above saying if u hear gods words and put it into practice your either Jesus brother or mother?..... Is that literal brother and mother or metaphorical? Why not apply the similar saying to Mary Pbuh when she was called the sister of Aaron?  Isn't that double standards from from Christians!! We also read from genesis Abraham calling his nephew lot BROTHER!!

And when Abram heard that his brother lot was taken captive, he armed his trained servants, born in his own house, three hundred and eighteen, and pursued them unto Dan. (Genesis 14:14)

And he brought back all the goods, and also brought again his brother Lot, and his goods, and the women also, and the people. (Genesis 14:12)

So Abram said to Lot, "Please let there be no strife between you and me, nor between my herdsmen and your herdsmen, for we are brothers. (Genesis 13:8)

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Once again are the above passages metaphorical or literal you choose, let's be consistence and rational, we know they mean brothers and sisters mothers and fathers in faith and to finish off this absurd desperate attempt to attack Islam by Christians I would like to close this with a verse from the book of Luke 

In the time of Herod king of Judea, there was a priest named Zechariah, who belonged to the priestly division of Abijah, and whose wife Elizabeth was a daughter of Aaron.

(Luke 1:5)

Was she really the daughter of Aaron ? Or descendent now imagine if we start playing those pathetic games how will u react!!   

"I have become a brother to jackals And a companion of ostriches.

(Job 30:29)