There is much difference between not being for Jesus Christ, and saying it, and not being for Jesus Christ, yet feigning to be so. The one party can work miracles, not the others, for it is clear that the one party are against the truth, but not that the others are; and thus miracles are the more clear.
"If you believe not in me, believe at least in the miracles." He puts them forward as the strongest.
He had said to the Jews as well as to the Christians, that they should not always believe the prophets; but nevertheless the pharisees and scribes made much of his miracles, and tried to show that they were false or worked by the devil, since they were bound to be convinced, if they admitted that these were of God.
We are not in these days obliged so to discriminate. Yet it is very easy to do so; those who deny neither God nor Jesus Christ work no miracles which are not quite certain.
Nemo facit virtutem in nomine meo, et cito possit de me male loqui.
But we have not to use this discrimination. Here is a sacred relic, here is a thorn from the crown of the Saviour of the world, on whom the prince of this world has no power, which works miracles by the immediate power of the blood that was shed for us. Thus God has himself chosen this house wherein openly to show forth his power.
Here are not men who work miracles by an unknown and doubtful virtue, obliging us to a difficult discrimination; it is God himself, it is the instrument of the passion of his only Son, who being in many places chose this, and made men come from all sides, there to receive miraculous succour in their weaknesses.
If the devil were to favour the doctrine which destroys him, he would be divided against himself, as Jesus Christ said. If God favoured the doctrine which destroys the Church, he would be divided against himself. Omne regnum divisum.
For Jesus Christ acted against the devil, and destroyed his empire over the heart, of which exorcism is the figure, to establish the kingdom of God. And so he adds: Si in digito Dei, regnum Dei ad vos.
Either God has confounded the false miracles or he has foretold them, and both by the one and the other he has raised himself above the supernatural in regard to us, and has raised us also.