We live in an amazing day and age when products we buy almost always come with a guarantee-that wonderful little paper that says that if the product doesn't work or we're not satisfied, the manufacturer will exchange it or give us our money back! From appliances to cars to toys to clothes. did you know that even your marriage has a guarantee? The guarantee comes from God, who is the author of marriage. The guarantee is seen in I Corinthians 13:8 where He says. LOVE NEVER FAILS. If we learn to love like God wants us to, then WE WILL NOT FAIL.