Logic, I like that.Preaching relates to religion (opinion and belief), but I'm talking about facts and logic.
I find it logical that God who created us and says He loves us, also lay His life down and try reach out to us. God the Son died for us. God the Holy Spirit reaches out, teaches and guides us.
If the trinity was not true, then Jesus would be the one who drew the short straw. When God says He loves us, we would doubt it.
Any non - trinity teaching will inevitably lead one away from the love of God. Exactly what the devil would want.
Jesus was crucified for saying He is equal to God John 5:18. Why would Jesus lie?