Thus says the Word of God:
Trust in the LORD forever, for the LORD GOD is an everlasting rock.
(Isaiah 26:4, ESV)
Isaiah the prophet gives us a joyous invitation to sing to the Lord a new song, celebrating the full redemption of the land of Israel in the consummation of the ages. In his joy, the prophet encourages us to trust in the LORD, the Rock of Ages. That is precisely the “hearty trust” that the Heidelberg Catechism proposes to us regarding faith:
True faith is not only a sure knowledge whereby I hold for truth all that God has revealed to us in His Word, but also a hearty trust, which the Holy Ghost works in me by the Gospel, that not only to others, but to me also, forgiveness of sins, everlasting righteousness, and salvation are freely given by God, merely of grace, only for the sake of Christ’s merits.
(Heidelberg Catechism, q. 21)
This «hearty trust» in the LORD is that intimate and deep confidence of those who know that the Lord will never fail them. Is an everlasting confidence, which has its eyes sets in the Lord in all times. It is perpetual, eternal and continuous in its extension; deep and unwavering in its intensity; and an invincible mighty fortress in its strength. The trust proposed to us by the Prophet abides and remains in good times and in those not so good; in calm weather and in the fiercest of the storms of life. It is a trust that stays the same without depending on whether we feel right or wrong, good or bad.
Finally, notice that there is only one way to get this strong, abiding and eternal trust in the Stronghold of Ages. Everlasting trust is possible only for those who already posess everlasting life. It is none other than the Lord Jesus Christ, the Founder and Perfecter of our faith, the one who opens for us the door of the Everlasting Rock. Let us look to Jesus, trusting Him in all times, because He is our strength, and may these words of the Prophet be also ours: “Your name and remembrance are the desire of our soul” (Isaiah 26:8b, ESV).
Lord God, who are the Everlasting Rock and our sure help in times of trial: Grant us, by your Holy Spirit, that we might show every day more and more trust in you, so that we, by looking to Jesus, might serve you, doing your will and proclaiming your Gospel. By Jesus Christ, our Lord. Amen.