The Heidelberg Catechism is a book of comfort for God's true children, which is hated by the enemy and loved by the godly, and that will always remain so. Also, in this catechism is expounded in a precious way, how the Lord converts a person and that there is nothing included from man's side, for there is only one God, with whom we must be reconciled; there is only one Mediator, by which we can be reconciled to God and in Whom the triune God is eternally glorified, of Whom the poet says:

Through Him, through Him alone, Whose presence goes before us,
We'll wear the victors crown, no more by foes assaulted,
We'll triumph through our King, by Israel's God exalted.