Contra post-modernism, morality is not determined by the opinion of the majority. Right and wrong are determined by the very character of God Himself. What is right, is right according to the goodness, justice, wisdom, power, and love of the Living God. What is wrong is wrong because it contradicts all of Who God is and what His revealed will is.
The church meets, not as those who have joined a common cause, or signed up for a club membership, but as the fellowship of the redeemed. Jesus said to His disciples, “You did not choose me, but I chose you and appointed you that you should go and bear fruit” (John 15:16). We are His people, and we owe everything to Him.