from Being a Christian, by Dr. Jason Allen
Christianity is a heart religion. In fact, the Bible refers to conversion as the “circumcision of the heart” (Romans 2:29). As believers, we speak of inviting Jesus into our hearts. And, as more than one preacher has promised, “Jesus will give you a new heart for a new start.”
Additionally, one way we know the power of a sermon is its effect on the heart. At Pentecost, in Acts 2, after the apostle Peter delivered one of the most powerful sermons in church history, the crowd was “pierced to the heart” (Acts 2:37).
St. Augustine famously observed, “Thou hast made us for thyself, Oh Lord, and our hearts are restless until they rest in thee.” That happens at conversion. Our hearts are satisfied, completely and eternally, through Christ. We then enjoy the inner peace we feel as we worship, pray, and draw near to God.
So, the gospel renews our heart, but it also renews our mind – and more so than most Christians realize. Like every other aspect of our lives, our minds are fallen, darkened by sin, and must be redeemed. The gospel does just that.
“Love the Lord your God with all your heart, with all your soul, and with all your mind.” This is the greatest and most important command. Matthew 22:34-38