I have found that some of the doctrines of my church were not backed up in scripture like that Christ changed what the Father stated was His way, or that God cancelled Passover and put in communion services to replace it.This is more of an experiment . If we take each point we claim ,does the bible actually say it somewhere . literally say the thing we claim to believe ?
Now I make it a rule to use my concordance to check carefully all I am told about God and scripture. I also find it is necessary to carefully check the interpretations of others, especially if I have disagreed with them so I carefully examine why they believe as they do to see if they are correct and I was wrong.