"Who was Cain's wife?" ~Ralph

If there were only 4 people on earth, who was Cain's wife?

This is an intriguing question, but certainly not a barrier to faith in God.

There's a really neat article on this if you follow the link below, but the short answer is that Cain would have married another of Adam's descendants. according to Genesis 5:4, Adam lived at least 930 years and had other sons and daughters. Some historians say that he had as many as 56 kids. If you consider 14-20 years per generation (since women became mothers very early until recent years) the number of possible descendents Adam would have had in his own lifetime would be staggering. The Bible doesn't say when Cain killed Able, or how many children Adam had at the time. We don't even know whether Able was the second born, though he was probably the second son at least.

It seems to me that this issue is not the source of your doubts, but just fuel to the fire. Correct me if I'm wrong, but it seems like your true struggle is with the goodness of God. We cannot fully understand God, but we do get some pretty good clues as to why God allows us to suffer on earth. Check out this Everystudent article and a follow-up conversation I had with someone.

For further evidence of God's existence, surf the EveryStudent website, particularly the articles at this page this page.

I hope this helps. Please feel free to give me feedback or ask any other questions. If any of this has had an impact on your view of God or Jesus, please read this article with an open heart and let me know if there's anything more I can do to help you.