D&C 19
In this revelation to Martin Harris, the Lord commands not to talk of tenets but rather to preach repentance and faith in Christ. In other words, don’t try to convert people through revealing mysteries, or logical persuasion. Give them pure doctrine by inviting them to come unto Christ. Martin is told that this command to teach the fourth article of faith to all people he has the chance to meet is the only command he needs from the Lord for the rest of his life.