Understatement is always the absolute best way to put forth earth shaking ideas. Tell me what you know. Puns are for children, not groan readers. Go around the barn at high noon to avoid colloquialisms. Even IF a mixed metaphor sings, it should be derailed.
Exaggeration is a billion times worse than understatement.
Proofread carefully to see if you any words out. So we started working on the 6th commandment. Then I asked her if she knew what it meant. My 3 year old son thought that St. Michael, St. Raphael and St. Gabriel were the three HarkAngels. My four year old daughter had been sitting in on our lessons and my seven year old was memorizing the Act of Contrition.