"The secret of the Lord is with them that fear Him." Ps. 25:14"The truth and sincerity of God to his people appears in the openness and plainness of His heart to them. A friend that is close and reserved, deservedly comes under a cloud in the thoughts of his friend, but he who carries, as it were, a window of crystal in his breast, through which his friend may read what thoughts are writ in his very heart, delivers himself from the least suspicion of unfaithfulness. Truly, thus open-hearted is God to His saints: "The secret of the Lord is with them that fear Him." He gives us His key, that will let us into His very heart, and acquaint us with what His thoughts are, yea, were, toward us, before a stone was laid in the world's foundation: and this is no other than His Spirit (1 Cor. 2:10-11), "One who knows the deep things of God;" for He was at the council-table in heaven, where all was transacted. This, His Spirit, He employed to put forth and publish in the Scriptures, indited by Him, the substance of those counsels of love which had passed between the Trinity of Persons for our salvation; and so that nothing may be wanting for our satisfaction, He hath appointed the same Holy Spirit to abide in His saints, that as Christ in heaven presents our desire to Him, so He may interpret His mind out of His word to us; which word answers the heart of God, as face answers face in the glass."
-William Gurnall in Charles Spurgeon's "The Treasury of David", A commentary on the Psalms