Christianity is all about sharing truth — most of the time. But there are times when we should just keep our mouths closed. Proverbs 23:9 indicates one of those times: “Do not speak in the hearing of a fool, for he will despise the wisdom of your words.”
Here the Bible tells us that we don’t have to labor endlessly in debate with people who are not really listening to us. It is like what Jesus said in Matthew 7:6, “Do not give what is holy to dogs, and do not cast your pearls before swine.”
And He modeled this very thing in fact, when He refused to answer Pilate when He was on trial (Matthew 27:14). He fulfilled Isaiah 53:7 by not opening His mouth — but He also exemplified Proverbs 23:9 by not wasting His wisdom on those who only wished to mock Him.
So this proverb can serve as a good guide for us. If someone is really open to what you say, then by all means share with them. But don’t “cast the pearls” of precious truth on those who repeatedly mock it, or who have no intention of really listening. Jesus felt under no compulsion to answer fools — and we should not either!