19 But I ask what it is that they do not believe; is it whether any one can be aided by the martyrs? This is the same thing as not to believe Christ, for He Himself said: “You shall do greater things than these.” How? By those martyrs whose merits have been long efficacious, whose bodies were long since found? Here I ask, do they bear a grudge against me, or against the holy martyrs? If against me, are any miracles wrought by me? By my means or in my name? Why, then, grudge me what is not mine? If it be against the martyrs (for if they bear no grudge against me, it can only be against them), they show that the martyrs were of another faith than that which they believe. For otherwise they would not have any feeling against their works, did they not judge that they have not the faith which was in them, that faith established by the tradition of our forefathers, which the devils themselves cannot deny, but the Arians do.
Source: Letters (New Advent)