17 The peak of the revelation as reached in the Gospel of Christ is final and permanent. It knows no retouches by human hand; it admits no substitutes or arbitrary alternatives such as certain leaders pretend to draw from the so-called myth of race and blood. Since Christ, the Lord's Anointed, finished the task of Redemption, and by breaking up the reign of sin deserved for us the grace of being the children God, since that day no other name under heaven has been given to men, whereby we must be saved ( Acts iv. 12). No man, were every science, power and worldly strength incarnated in him, can lay any other foundation but that which is laid: which is Christ Jesus (1 Cor . iii 11). Should any man dare, in sacrilegious disregard of the essential differences between God and His creature, between the God-man and the children of man, to place a mortal, were he the greatest of all times, by the side of, or over, or against, Christ, he would deserve to be called prophet of nothingness, to whom the terrifying words of Scripture would be applicable: "He that dwelleth in heaven shall laugh at them" ( Psalms ii. 3).
Source: Mit Brennender Sorge (Vatican.va)