message-delivery via subtext

Delivering a message via subtext is powerful, like hitting the ball with a bat instead of just shoving the ball with the bat.
Example 1: “Sincerity is no substitute for competence.” is the subtext of “No good deed shall go unpunished.”
Example 2: “Texting while driving is a lethally-stupid thing to do.” is the subtext of “Honk if you love Jesus. Text while driving if you want to meet him.”
Example 3: “Be aware that you’re being messaged.” is the subtext of “Messages should be sent by Western Union.”
[Language Arts]
[reading between the lines]
[hidden meaning]
[hidden agenda]