Sanctification is absolutely essential to the life of faith—so much so that Scripture frequently treats holiness as the identifying mark of a true and growing believer. It is God’s will for all believers to grow in our sanctification process, to be set apart from sin and to become holy as God Himself is holy—to be like His Son Jesus Christ. It takes time to grow and we each grow in unique ways. This is possible because of the work that God has done in our lives. So we must make every effort and train ourselves for godliness so that we can be transformed into His image.