According to Merriam-Webster, a principle is a comprehensive and fundamental law, doctrine, or assumption. Gospel Principles are those doctrines (or teachings) of the gospel that are foundational, fundamental or key. The best source for understanding the principles of the gospel is the Gospel Principles HTML edition or Gospel Principles Manual PDF edition (3mb), published by the Church. You can sign up for a weekly lesson from the Gospel Principles manual with added resources and scriptures at: Weekly Gospel Principles List Gospel principles include