John Knox, from his “Treatise on Prayer” [The Select Practical Writings of John Knox (Edinburgh; Carlisle: Banner of Truth, 2011), 12-16]
[G]odly prayer requireth … the perfect knowledge of the advocate, intercessor, and mediator; for, seeing no man is himself worthy to compear, or appear in God’s presence, by reason that in all men continually resteth sin, which, by itself, doth offend the majesty of God, raising also debate, strife, hatred, and division betwixt his inviolable justice and us, for the which, unless satisfaction be made by another than by ourselves, so little hope resteth that any thing from him we can attain, that no surety may we have with him at all.
To [release] us from this horrible confusion, our most merciful Father, knowing that our frail minds should hereby have been continually dejected, hath given unto us his only beloved Son, to be unto us righteousness, wisdom, sanctification, and holiness. If in him we faithfully believe, we are so clad that we may with boldness compear and appear before the throne of God’s mercy, doubting nothing, but that whatsoever we ask through our mediator, that same we shall obtain most assuredly. Here, is most diligently to be observed, that without our mediator, forespeaker, and peace-maker, we enter not into prayer; for the incallings of such as pray without Jesus Christ are not only vain, but also, they are odious and abominable before God….
For he who honoureth not the Son, honoureth not the Father. For as the law is a statue that we shall call upon God, and as the promise is made that he shall hear us, so are we commanded only to call through Jesus Christ, by whom alone our petitions we obtain; for in him alone are all the promises of God confirmed and complete. Whereof, without all controversy, it is plain, that such as have called, or call presently unto God by any other mean than by Jesus Christ alone, do nothing regard God’s will, but obstinately prevaricate, and do against his commandments; and therefore, obtain they not their petitions, neither have entrance to his mercy; ‘for no man cometh to the Father’, saith Jesus Christ, ‘but by me.’ He is our leader, whom, unless we follow, we shall walk in darkness; and he alone is our captain, without whom, neither praise nor victory ever shall we obtain….
Who, then, shall here be found the peace-maker? Surely the infinite goodness and mercy of God might not suffer the perpetual loss and repudiation of his creatures; and therefore his eternal wisdom provided such a mediator, having wherewith to satisfy the justice of God — differing also from the Godhead: — his only Son, clad in the nature of manhood, who interposed himself a mediator; not as man only; for the pure humanity of Christ of itself might neither make intercession nor satisfaction for us; but God and man. In that he is God he might complete the will of the Father; and in that he is man, pure and clean, without spot or sin, he might offer sacrifice for the purgation of our sins, and satisfaction of God’s justice. For unless saints have these two, Godhead equal with the Father, and humanity without sin, the office of mediators saints may not usurp….
Mark well these words. John saith, ‘we have presently a sufficient advocate; whom Paul affirmeth to sit at the right hand of God the Father (Rom. 8): and to be the only mediator between God and man; for he alone, saith Ambrose, is our mouth, by whom we speak to God: he is our eyes, by whom we see God; and also our right hand, by whom we offer any thing unto the Father; who, unless he make intercession, neither we, neither any of the saints, may have any society or fellowship with God. What creature may say to God the Father, ‘Let mankind be received into they favour; for the pain of his transgression, that I have sustained in my own body; for his cause was I encompassed with all infirmities, and so became the most contemned and despised of all men, and yet, in my mouth was found no guile nor deceit; but always obedient to thy will, suffering most grievous death for mankind. And therefore, behold not the sinner, but me, who by my infinite righteousness have perfectly satisfied for his offences’? — May any other, Jesus Christ except, in these words make intercession for sinners?…
Some say, we will use but one mediator, Jesus Christ, to God the Father; but we must have saints, and chiefly the Virgin, the mother of Jesus Christ, to pray for us unto him…. Alas! whosoever is so minded, showeth himself plainly to know nothing of Jesus Christ rightly. Is he who descended from heaven, and vouchsafed to be conversant with sinners, commanding all sore vexed and sick to come unto him (Matt. 11), who, hanging upon the cross, prayed first for his enemies, become now so untractable, that he will not hear us, without a person to be a mean? O Lord open the eyes of such, that they may clearly perceive thy infinite kindness, gentleness, and love towards mankind.