The Bible defines marriage in Genesis 2:24 as a union between one man and one woman. Jesus Christ upholds this definition of marriage in Matthew 19:5, as does the Apostle Paul in Ephesians 5:31. Any and all sexual activity which takes place outside of this context is treated as sinful, what Jesus calls ‘sexual immorality’ in Mark 7:21.
Further, we are convinced that the Bible leaves no room whatsoever for confusion or ambiguity where homosexual behavior is concerned. The Scripture both explicitly and implicitly regards it as falling outside of God’s intention in creating man and woman as sexual beings who bear His image as male and female.
In Biblical opinion, the clarity of God’s truth on this matter remains unchanged in spite of hermeneutical methods designed to justify homosexual behavior. The Bible prohibits all kinds of sexual promiscuity – heterosexual as well as homosexual. Logical consistency demands that individuals and groups who want to reinterpret Scripture to sanction free sexual expression among homosexuals should extend the same concession to heterosexual singles; and, in fact, some have already taken this next step. But none of this can alter the facts: there is simply no scriptural support for endorsing sexual immorality (i.e., sexual activity outside the bond of heterosexual marriage) for anyone, no matter what his or her personal sexual feelings may be.
Many theologians say this is the key passage on homosexuality in the New Testament.
Paul writes: “God gave them over to shameful lusts. Even their women exchanged natural sexual relations for unnatural ones. In the same way the men also abandoned natural relations with women and were inflamed with lust for one another. Men committed shameful acts with other men, and received in themselves the due penalty for their error” Romans 1:26-27. Jeff Weima, an expert on the New Testament at Calvin Theological Seminary in Grand Rapids, is among those who say this passage is a clear, unambiguous condemnation of homosexual activity.
“The text of Romans 1:26-27 is quite clear about the prohibition of same-sex activity for both men and women,” Weima said.
The Scriptures are, therefore, consistent in their prohibition of same-sex sexual activity, across different periods of salvation history and within different cultural settings. Although the Scriptures are clear on sexual ethics, they also tell us that the prospect of forgiveness and eternal life is held out for anyone who turns from sin and puts their faith in Christ (Mark 1:15), no matter how they may have fallen short of his good design for sex and marriage.