Our Christian doctrinal beliefs and teachings have their origin in the Old testament and go through and include the entire New Testament. They are God's 'revelation' in the Scriptures. We seek illumination from the Holy Spirit that we might understand them, glean from them and apply their teachings. Christians may disagree on what precisely the Scriptures teach -- the many denominations testify to this fact. However, we should strive to learn the background of the foundations of the Church so as not to be deceived by heretical teachings.