When you are controlled by the Holy Spirit your life has the potential to change everything it touches: walking in the Spirit leads to healthy relationships with family, friends and employers, it catches the attention of watching unbelievers, and it fans a flame in other Christians.

But how do you know whether you are actually relying on the Spirit's power? What does it look like to walk with him, and what are the marks of a Spirit-filled believer? John MacArthur answers from Scripture in a short booklet, clearing away the confusion the phrase has collected. Inexpensive enough to buy for a whole group.