The apostle Paul wrote that Christ died that we should no longer live for ourselves but for Him (2 Cor. 5:15). To live no longer for ourselves but for Him is the essence of discipleship. That phrase sums up all we could include under the headings of disciplines, holiness, and service. But what is it that will motivate us to live not for ourselves but for Him? Paul said it is the love of Christ: “For Christ’s love compels us” (2 Cor. 5:14)….
Notice though, what compelled or motivated Paul in such a strong manner. It was not a continual challenge to be more disciplined, or more committed, or more holy. Rather it was his constant heartfelt awareness of Christ’s love for him….
We believers need to be challenged to a life of committed discipleship, but that challenge needs to be based on the gospel, not on guilt or duty.
Jerry Bridges, The Discipline of Grace, Chapter One