Jesus said: "And he answered and said unto them, Have ye not read that he which made them at the beginning made them male and female, And said, For this cause shall a man leave father and mother, and shall cleave to his wife: and they twain shall be one flesh? Wherefore, they are no more twain, but one flesh. What therefore God hath joined together, let not man put asunder." -from THE BIBLE: Matthew 19:4-6
Romans 1:20-32 seems pretty clear to me
And Jesus knew their thoughts ,and said unto them,"Every
kingdom divided against itself is brought to desolation,and
every city or house divided against itself,shall not stand.. . . He that is not with Me is against Me,and he that
gatherethnot with Me scattereth abroad." Matthew 12:25,and 30 Those churches who are divided from what is written have
separated themselves form God And it is our duty to "come out from amongst them- to resist the devil and he will flee from you.