Psalm 25:14

The secret of the Lord [is] with them that fear him
The secret of his purposes with them; as his purpose according to election; his resolution to redeem his chosen ones by his Son; his design to call them by his grace; his predestination of them to the adoption of children, and eternal life; which are the deep things of God the Spirit of God reveals; and all which are made manifest to them in effectual calling; and the secret of his providences is with them; some are made known to them that fear the Lord before they come to pass; as the destruction of Sodom and Gomorrah to Abraham, with many other instances in the Old Testament; see ( Amos 3:7 ) ; and what is the book of the Revelation but a revelation of the secrets of Providence, from the time of Christ and his apostles, to the end of the world? some they observe and take notice of while they are performing, and see the gracious designs of God in them, for their good and his glory; and though some of his ways of Providence are past finding out, and his footsteps are not known as yet; hereafter his judgments will be made manifest, and the whole scene will be opened to the saints, and be clear to their view: the secret of his love, free grace, and favour, is with them, which was in his heart from everlasting, and lay hid in his thoughts, which are as much higher than ours as the heavens are higher than the earth; and which is made manifest in regeneration, and then shed abroad in the hearts of his people: secret communion with God is enjoyed by those that fear him, which is what the world knows nothing of, and the joy that results from it is what a stranger intermeddles not with; the Lord has his chambers and secret places, into which he brings them, and where they dwell. The secret of his Gospel is with them; and the mysteries of it, which were kept secret since the world began; as the mystery of a trinity of Persons in the Godhead; the union of the two natures in Christ; the regeneration of the Spirit; the union of the saints to Christ, and their communion with him; the calling of the Gentiles; the resurrection of the dead; and the change of living saints;

and he will show them his covenant:
the covenant of grace, which was made with Christ for them from eternity, is made known to them in time, when they are called by the grace of God, and made partakers of the grace of the covenant, then the Lord reveals himself as their covenant God and Father; shows them that his Son is their surety, Mediator, Redeemer, and Saviour; puts his Spirit into them to implant covenant grace in them, to seal up the blessings of it to them, and bear witness to their interest in them, as pardon, justification, and adoption; and to apply the exceeding great and precious promises of it to them.