Read Matthew 7:1-20 to start.
When I was younger, there was a topic that many of my friends and I were frequently concerned with. It kept coming up, and was never adequately resolved, because some people took a firm stance on one side, and some on the other side. Some people did not care either way, and some said that it was too difficult to really tell the difference. I recall once actually testing some friends to see if their imagined preferences actually lined up with reality, and could they tell the difference.
This is not some great and important spiritual or philosophical matter. This is not about right versus wrong. This is about Coke versus Pepsi.