When we look at the pace of our modern world, with its relentless noise and constant distractions, it is easy for our spiritual lives to become shallow and reactive. But if we turn to the Puritans—masters of the soul like John Owen, Richard Baxter, and William Gurnall—we discover a timeless truth: the mind is the primary battleground of the faith. They understood that whatever captures our thoughts will ultimately capture our desires, shape our character, and govern our worship. Far from being a passive space, the mind must be actively guarded against the subtle intrusions of worldliness, the sluggishness of mental ease, and the intrusive noise of unwanted distractions. Tonight, we are going to explore this rich Puritan tradition of spiritual psychology, discovering how taking control of our inner thought-life is the essential key to cultivating a heart that truly loves God and finds lasting peace.