https://www.mljtrust.org/sermons-online/john-4-13-14/a-new-quality-of-life/

Does the saved person comprehend Christianity? Have they also been changed by it? While good doctrine is necessary, Dr. Martyn Lloyd-Jones explains in his sermon on John 4:13–14 titled “A New Quality of Life” that the Christian doesn’t merely follow a teaching but instead the Christian’s life is changed by the Holy Spirit. It is not about what they do but what is done to them. He describes that the Holy Spirit changes people in a moment and over time. Every Christian is changed instantly when they are regenerated and given new life. Moreover, every Christian undergoes some degree of change through sanctification, which means being changed progressively over the course of an entire lifetime. Dr. Lloyd-Jones explains that one of the best ways to perceive these changes is to look at the fruit of the Spirit. The fruit of the Spirit is evidence of a changed life; a life that is impacted by the Spirit and given new life. Dr. Lloyd-Jones goes on to detail these fruits and categorize them. The Christian asks themselves: “Do you find that you have been changed by the Holy Spirit? Do you have a new heart with good desires and joy?” All are encouraged to listen and hear how to gain clarity on the state of the soul.