Thought from Today's Old Testament Passage:
"Thou wilt keep him in perfect peace, whose mind is stayed in Thee; because he trusteth in Thee." — Isaiah xxvi. 3.
How does the Lord keep His people in peace? I answer, first, by a special operation upon the mind in the time of its trial. We read in the twelfth verse, "Lord, Thou wilt ordain peace for us: for Thou also hast wrought all our works in us." If this be so, we can understand how the Lord can work peace in us among all the other works. There is an operation of God upon the human mind, mysterious and inscrutable, of which the effects are manifest enough; and among those effects is this, a quiet of heart, a calm of spirit, which never comes in any other way. "Thou wilt keep him in perfect peace." The Creator of our mind knows how to operate upon it by His Holy Spirit. Let the heart and will be allowed to be as free as you choose, yet is the Lord free to act upon them. As we can tune the strings of a harp, so can the Lord adjust the chords of our hearts to joyous serenity. Not only by the Word of God, and by our meditation thereon, but by His own direct operation, the Lord can create peace within the land-locked sea of the human spirit. The Lord can get at men, and influence them for the highest ends, apart from outward means. I have noticed that, altogether apart from the subjects of my reflections, I have, on a sudden, received a singular calm and peace of spirit directly from God…. Generally, I grant you, we are led into this peace by the consideration of the promises of God; but sometimes, apart from that, without our knowing why or wherefore, we have upon a sudden glided from darkness into light, by the distinct operation of the Spirit of God upon the mind.
C. H. Spurgeon, The Treasury of the Bible, Vol. 3 (Grand Rapids, MI: Zondervan, 1962), pp. 480-481.