“Have ye not read, that he who made man from the beginning, Made them male and female? . . . For this cause shall a man leave father and mother, and shall cleave to his wife, and they two shall be in one flesh.”
These are the words of Jesus Christ in Matthew 19 regarding Matrimony. It is a Sacrament and as such we cannot change what has been instituted as a Sacrament. Funny how many advocates of same-sex unions like to bring up Jesus never said verbatim that it is wrong; yet He clearly stated what marriage is, meaning that in it “shall a man . . . cleave to his wife, and they two shall be in one flesh.”
So, what makes the homosexual lifestyle sinful? Sexuality, as natural law shows, is intended for the creation of children; this is closed in a homosexual relationship as it is biologically impossible for two men or two women to have children with each other. Marriage was created as a stable institution for one man and one woman to have children and continue society. We see it repeatedly in Scripture and Tradition. Right Rev. Gene Robinson, retired Episcopal Bishop of New Hampshire, mentioned the claim that natural law is a medieval invention not used by Saint Paul. Is it? Saint Paul says that “the men also, leaving the natural use of the women, have burned in their lusts one towards another, men with men working that which is filthy, and receiving in themselves the recompense which was due to their error” (Romans 1:27). Here we see a hint of natural law when he says men were “leaving the natural use of the women” for each other. Natural law is ancient and many have studied it; Aristotle is one of them and it is he who largely inspired Saint Thomas Aquinas who called him “the Philosopher”. “The Apostle”, as Saint Thomas Aquinas called him, said, “Because that which is known of God is manifest in them” (Romans 1:19). What is known of God? All “ungodliness and injustice” (v. 18). That includes two or more people of the same gender having sexual relations. Many know obviously that in the Old Testament it says, “Thou shalt not lie with mankind as with womankind, because it is an abomination” (Leviticus 18:22). They know this means penetrative sex between two people of the same gender; in other words, a man cannot have sex with another man as he would with a woman, hence “as with womankind”.
As mentioned earlier, referring to moral topics in the Old Testament does not constitute for cherry-picking. I already wrote about that in the Old Law thread. As for Rainbow Dash and rainbows, that has already been discussed, but I will discuss for another time the different uses of the rainbow.