False Standards
I often hear people trying to establish right and wrong based on the wrong standard. Here are some examples:
Our Parents (Matthew 10: 21, 34-37) As much as we should love and respect our parents, we cannot establish right and wrong on the basis of our parents alone.
Our Conscience (Acts 23:1, 26:9-11; 1 Timothy 1:12-13) Even though our conscience can be useful, we may still be wrong even though our conscience doesn't bother us. Paul had followed his conscience even when he was a persecutor.
Emotions & Feelings (Proverbs 14:12; 28:26; Jeremiah 10:23) Just because something "feels" right to you, that doesn't necessarily make it right. Sin can even "feel" right.
The Majority (Matthew 7:13-14) Do not ever think that something is right simply because most believe it. The majority is headed to destruction.
Preachers & Religious Leaders (2 Corinthians 11:13-15; 2 Peter 2:1-3) Your preacher may be a great guy, but that doesn't mean he is right.
Tradition (Matthew 15:1-9; Colossians 2:8) Truth is not established by how long something has been around. Sin has been around a long time, too.
The Good End (Romans 3:8) The end doesn't always justify the means. Something is not right just because we may think it is causing "good".