Am I now suggesting that it is biblically possible for the body to cause homosexuality? Indeed, I am, provided – and read carefully – the word “cause” in this context means “biologically shape or influence,” not “irresistibly compel.” Used this way, there is nothing shocking about what I am saying. Our sinful hearts express themselves in behavior via hundreds of factors, biology being one. A person whose sinful heart acts out in murder may have been influenced by unjust treatment, by parents who allowed him to vent his rage on siblings and by Satan’s incessant suggestions to kill. But none of these influences remove his personal responsibility for his intentions or actions. The ultimate cause of sin is always the sinful heart.
Edward Welch