A disciples growth in Christ doesn’t happen by accident. We don’t coast into Christlikeness. Our sanctification results from a partnership with the Holy Spirit that began on Day One of our walk with the Lord. Every Christian who reads that first paragraph probably agrees. But in practice, the vast majority of those who call themselves Christian do very little to live out their faith. We’ve all read Jesus’ words in Mark 8:34: If anyone wants to follow after me, let him deny himself, take up...