my brother is a nominal Christian, who has been living together with his unbelieving girlfriend (and now fiancé) for some years. They are going to marry next year and he asked me if I wanted to be his best man. I love him dearly and I, obviously, do not want to hurt him. However, I will not make this decision without asking God in prayer and studying the word. Unfortunately, after studying 1 Corinthians 7, I was not able to find answers to my specific case, and I do not know if there are other passages in the Scriptures that speak to this. I am not happy with the situation, for I wish he was a true, faithful, God-loving believer (and her, too), but at the same time, I realize that I am called to love him regardless, and I do. My question, specifically speaking is this:
By agreeing to be his best man, would I sin by condoning this marriage covenant, which is not between believers and not done according to God’s plan for marriage? Additionally, after their civil wedding, they will also have a church wedding which will make it worse, for they would profess something before God that is not true, unless Jesus finds them first and saves them (which would be absulutely magnificent). My brother argues, that, for the civil wedding, I could be his best man regardless of my convictions, because it is ‘just’ before human made law and not before God himself (in contrast to marrying in church). I am not sure if I can agree with this.
Let me assure you that I do not take this lightly, and I love him incredibly, which is why I want to act biblically and protect him as best as I can from heaping up God’s wrath. I do not want to compromise my obedience to Jesus, but the same goes for a biblical loving relationship to my brother.
I assume that this might be a (very) difficult question that grants no straightforward yes-or-no-answer. Nevertheless, I am very eager to read your takes and perhaps somebody will read this, who knows their Bible way better than me.
Regardless, I am incredibly thankful for your time and input in this. I promised him I would give him my reply within this ongoing week. Please pray for this issue, if you feel called to do that.
Thanks so much guys!