5 Now the purpose of the commandment is love from a pure heart, from a good conscience, and from sincere faith, 6 from which some, having strayed, have turned aside to idle talk, 7 desiring to be teachers of the law, understanding neither what they say nor the things which they affirm. (1 Timothy 1:5–7, NKJV)
To faithfully teach the gospel one must first be willing to be taught (see 2 Timothy 2:2). Commitment to the commands of God produce love from a pure heart, a good conscience and sincere faith. Love for God, for truth, and for others compels us to learn God’s word before trying to teach it. Desire to teach the gospel without having a knowledge of it may well result in leading a person astray from the very truth he desires to teach. Like zeal without knowledge, desire to teach that is not fettered to knowing the truth produces vain, yet confidently asserted babbling, instead of “godly edification which is in faith” (1 Timothy 1:4). Take time to study and learn God’s word. Examine your motive for desiring to be a teacher of the word. Is it “love from a pure heart, from a good conscience, and from sincere faith?” And remember, faithful teachers never stop studying to learn and know the truth they teach.