James 4:11-12 Brothers and sisters, don’t say evil things about each other. Whoever insults or criticizes a brother or sister insults and criticizes the Law. If you find fault with the Law, you are not a doer of the Law but a judge over it. There is only one lawgiver and judge, and he is able to save and to destroy. But you who judge your neighbor, who are you?
Jesus said “Don’t judge, so that you won’t be judged.” (Mathew 7:1) Someone will always say or do something you don’t agree with. Conversely, you will say or do something that someone else will not agree with. If it isn’t clearly spelled out in the Bible one way or another, then no one has the right to judge or criticize what is being said or done.
Believers will say or do things based on their own understanding of God’s will in their life. You must remember that each of us has a conscience and, as a believer, it is led by the Holy Spirit.
Sometimes, someone will say that a certain activity is not permitted for Christians to do. Be careful with this. you may end up criticizing someone for doing something that is OK for them to do. What you are doing is making a judgement call on someone else and possibly creating your own law in the process. Some call this “legalism”. When you start telling people that doing this or doing that is a sin, when it isn’t expressly forbidden by the Word of God, you take the position of lawgiver and judge. There is only one lawgiver and judge–God, and you must never take his place.
God speaks to different people in different ways. If a Christ follower’s conscience tells him or her that a certain activity is fine, then that is God’s law at work in that believer. By criticizing that person, you are criticizing God’s law for that person.
It is ultimately up to God to judge our actions. He is the one who is able to save and destroy those acts should they be wrong. It isn’t up to you.
There are certain things that are very clear in the Bible that are not permissible for believers like adultery, promiscuity, and sexual immorality. If a believer is found to be committing specific acts that are considered sin in the Bible, then that person must be brought to the elders of their local assembly of believers. It is the congregation that decides the right course of action in this case, not the individual believer.