Why is it important to teach the doctrine?
Jesus commanded us to “teach one another the doctrine of the kingdom” (D&C 88:77). Doctrine is the word of God as found in the scriptures and the teachings of latter-day prophets and apostles. The word of God has power to change our lives.
Teachers must ensure that they keep the doctrine pure by teaching gospel truths as the Lord has revealed them. You can do this by teaching from the scriptures and the words of the latter-day prophets. President Ezra Taft Benson said, “Always remember, there is no satisfactory substitute for the scriptures and the words of the living prophets. These should be your original sources” (The Gospel Teacher and His Message , 6).
Also make sure that you use Church-produced materials when you teach. This will help you keep the doctrine pure. Avoid speculation and private interpretations.