Have you ever heard the phrase “putting lipstick on a pig”? It might sound like a rough job for a farmer, but it’s actually a way of describing the useless things people do to make something look better than it really is. No amount of lipstick can make a dirty pig look pretty, and no amount of good deeds can make up for a heart that loves itself more than Jesus.
The religious leaders said they loved God, but they failed to love others. They wanted people to praise them for how well they obeyed the laws, but they didn't obey what Jesus said was the greatest commandment. Jesus said that anyone who followed these religious leaders was being lead further from God, not closer.
Those who trust in Jesus receive a new heart with new desires. They desire to obey God for the right reasons: to honor Him and to share Him with others. Their love for God is shown through the ways they love others.
Jesus said that the greatest commandments are to love God and love others. (Matt. 22:37-39) The religious leaders loved themselves most of all. When we trust in Jesus, He makes us right with God and changes our hearts so we can love and obey Him.