“never underestimate your dumbness!!”
“Happens to me all the time...People are always underestimating my dumbness.”
“Never underestimate the power of your sister.”
“Never underestimate your power to change yourself; never overestimate your power to change others.”
“Never underestimate your listener's intelligence, or overestimate you listener's information.”
“No doubt, when your dog will be your best friend. Then she'd add, But never underestimate the power of purrs.”