We can't fool God
"Do not be deceived: God cannot be mocked. A man reaps what he sows"(NIV) Galatians 6:7
What sin did Jesus condemn more than any other sin? Hypocrisy, especially the flagrant, self-congratulatory kind practiced by the religious leaders of His day.
Religious hypocrites are unspiritual shams. They are trying to gain a reputation for spirituality by playing the role of God-lovers intent on obeying His law. They are unholy fakes who try to fool people, but they can't fool God.
I read an article about Luther Smith, a professor at Emory University's Candler School of Theology. He warned against the danger of "faking it", pretending to be something we are not. He mentioned that he had seen a bumper sticker that read, "Jesus is coming. Look busy."
Although we may look busy, we can't fool God about our faith, our character, or our service. Like the Pharisees, whom Jesus denounced (Mt. 23:13-28), we may appear to be sincerely religious, but the Lord knows if our profession is merely a facade without genuine devotion.
Are you a churchgoing hypocrite, depending on your own good works to gain entrance into heaven? Or are you trusting God's grace and relying on Christ? You can't fool God. It's not enough to look busy.