Respectfully your pastor is right. God saves a person's heart regardless of what their minds may think. One does not need to be an expert in Pauline theology to be saved. Every Christian -- without exception -- has errant views. If doctrinal perfection was the standard for salvation none would be saved -- (compare the 7 churches in Revelation. Look at their doctrine and yet they are called the church -- saved and unsaved alike among them). Don't forget that Paul's letters were written to "correct errant " views in the church -- thus these people were Christians (at least some of them) before reading the letters. Christan's may embrace heresy and still be saved.