https://www.mljtrust.org/sermons-online/ephesians-3-18-19/experimental-christianity/

In this sermon from Ephesians 3:18–19 titled “Experimental Christianity,” Dr. Martyn Lloyd-Jones explains why it is so important that Christians not only know the right things about God but also apply it to their lives. Many believers are like people who have been left a great fortune but do not realize it. God tells His children to apply their knowledge of Him to their lives, and part of this is not quenching the Spirit. Especially in today’s rationalistic culture, Christians are so wary of excess of emotion and the pitfalls it can bring in their relationship with the Lord that they cut themselves off to the depth of the knowledge of God about which Paul writes. Dr. Lloyd-Jones reminds that this fear of an excess is no reason to go to the extreme and leave no room for knowing God intimately in this way. Paul was adamant in proclaiming how much joy Christians can have by knowing the Spirit intimately, and Dr. Lloyd-Jones gives several examples to demonstrate that those who have been most fruitful for the Lord are those who knew Him intimately as a friend.