At first, we think the Christian life is about doing good. However, even atheists do good. There is much more to the Christian life than doing good.
Then, we may realize that life in Christ is a life of obedience (Mt 19:17; 1 Pt 1:2). If we love Christ, we will obey Him (Jn 15:10). Thus, obedience is essential to the Christian life, but there's still much more to Christianity.
Jesus told the young, rich man: "Go, sell your possessions, and give to the poor. You will then have treasure in heaven. Afterward, come back and follow Me" (Mt 19:21). Life in Christ is not only good works but God's works — not only obedience but total obedience. Life in Christ is not just following our Christian consciences, principles, and values. It is following the Person of Jesus Christ (see Mt 19:21) to the point that we are crucified with Him (Gal 2:19). Then the life we live is not our own; Christ is living in us (Gal 2:20). We still live our human lives, but they are lives of faith in Jesus, the Son of God (Gal 2:20). To us, " 'life' means Christ" (Phil 1:21).
The Christian life means losing our lives (Lk 9:24), living Jesus' life, living for Him alone, and living in Him and He in us (Jn 6:56).