The issue is — who says? The council three hundred and sixty three year after Christ? I am mot worshiping this council of humans.
Read the Bible. Ask the Holy Spirit to give you understanding. Start with an easy translation and go from there. There are sites where you can read the Bible online. Here’s a good one.
http://www.biblestudytools.com/
If you are earnestly seeking the Truth, you will find it. Once you know what you believe you’ll go to the right church.
Some people spend a lifetime trying to prove God, and miss the reason why they were created - to love the Lord with all their heart, mind, soul, and strength. That is the blessed life.