“The spiritual disciplines are the God-given means we are to use in the Spirit filled-pursuit of Godliness. 

Godly people are disciplined people.  It has always been so.  Call to mind some heroes of church history – Augustine, Martin Luther, John Calvin, John Bunyan, Susanna Wesley, George Whitefield, Lady Huntington, Jonathan and Sarah Edwards, Charles Spurgeon, George Mueller – they were all disciplined people.  In my own pastoral and personal Christian experience, I can say that I’ve never known a man or woman who came to spiritual maturity except through discipline.  Godliness comes through discipline.

Actually, God uses three primary catalysts for changing us and conforming us to Christlikeness, but only one is largely under our control.  One catalyst the Lord uses to change us is people.  “As iron sharpens iron, so one man sharpens another” (Proverbs 27:17).  Sometimes God uses our friends to sharpen us into more Christlike living, and sometimes He uses our enemies to file away our rough, ungodly edges.  Parents, children, spouses, coworkers, customers, teachers, neighbors, pastors – God changes us through these people.

Another change agent God uses in our lives is circumstances.  The classic text for this is Romans 8:28: “We know that in all things God works for the good of those who love him, who have been called according to his purpose.”  Financial pressures, physical conditions, even the weather are used in the hands of Divine Providence to stimulate His elect toward holiness. 

Then there is the catalyst of the Spiritual Disciplines.  This catalyst differs from the first two in that when He uses the Disciplines, God works from the inside out.  When He changes us through people and circumstances, the process works from the outside in.  The Spiritual Disciplines also differ from the other two methods of change in that God grants us a measure of choice regarding involvement with them.  We often have little choice regarding the people and circumstances God brings into our lives, but we can decide, for example, whether we will read the Bible or fast today.

So on the one hand, we recognize that even the most iron-willed self-discipline will not make us more holy, for growth in holiness is a gift from God (John 17:17, 1 Thessalonians 5:23, Hebrews 2:11).  On the other hand, we can do something to further the process.  God has given us the Spiritual Disciplines as a means of receiving His grace and growing in Godliness.  By them we place ourselves before God for Him to work in us.”

Copied from pages 15-16 of Donald Whitney’s book “Spiritual Disciplines For The Christian Life.”