Proverbs 20:9–11 (ESV)
9 Who can say, “I have made my heart pure;
I am clean from my sin”?
10 Unequal weights and unequal measures
are both alike an abomination to the LORD.
11 Even a child makes himself known by his acts,
by whether his conduct is pure and upright.
Although the righteous walk in integrity, none of us can claim moral perfection. Solomon asks a question with an obvious answer: “Who can say, ‘I have made my heart pure; I am clean from my sin’?” No one. None of us can cleanse our own hearts. From the earliest pages of Scripture, God reveals that humanity is corrupted by sin and unable to make itself righteous before him (Genesis 6:5; Job 9:2). Even our very best efforts fall far short of his perfect standard.
Our inability to achieve moral perfection does not lower God’s standard. The next proverb reminds us that the Lord still demands honesty. Merchants in Solomon’s day sometimes used dishonest weights and measures to cheat their customers for personal gain. God calls such deception an “abomination,” something utterly detestable to him. The God of truth delights in truth, and every attempt to deceive another person is ultimately an offense against him.
The final proverb reminds us that our actions reveal who we really are. “Even a child makes himself known by his acts.” Long before children can explain what is in their hearts, their behavior begins to reveal it. Left to themselves, they naturally insist on having their own way rather than submitting to God’s. That is why children need loving instruction, faithful correction, and the example of godly parents. The same sinful heart that must be shepherded in childhood remains our greatest problem as adults.
Take a moment to honestly examine your own heart. Are your words, your work, and your relationships marked by truth and integrity? Do you assume that because your life appears respectable, your heart is pure before God? Our conduct matters because it reveals what is within, and none of us can stand before God on the basis of our own righteousness.
The good news is that what we could never accomplish ourselves, Christ accomplished for us. He alone lived with a perfectly pure heart and walked in flawless integrity. Through his death and resurrection, he cleanses sinners from every sin. If you have never turned to Christ, do so today. If you belong to him, rejoice that you no longer stand before God in your own righteousness, but clothed in the perfect righteousness of Christ. The answer to Solomon’s question is not found in us, but in him.