Among these, many of the nobility, wearied with war, showed themselves well disposed. Sully set them the example. “That I should advise you to attend mass,” said he to Henry IV., “is a thing you should not, as I think, expect from me, being of another religion; but I tell you frankly, that it is the most prompt and easy mode of overturning all these malignant projects. You will no longer have to encounter so many enemies, troubles, and difficulties in this world; as to the other,” he continued, laughing, “I will not answer for that.” On which the king laughed also. Sully relates, in his “_Economies Royales_,” how he had conceived a theory, which admitted of passing in conscientious security from the Reformed communion to the Roman (Catholic) church. The king having caused him to be called very early one morning, requested him to sit down near his bed, and demanded his advice. Sully at first invoked political reasons, and as “the king was scratching his head in great perplexity,” he continued in these terms: “I hold it to be infallible, that of whatever kind of religion men make an external profession, if they die having observed the Decalogue, with a belief in the Apostles’ Creed, if they love God with all their heart, are charitable towards their neighbour, hope in the mercy of God, and to obtain redemption by the death, the merit, and the righteousness of Jesus Christ, they cannot fail to be saved.” It was thus that Henry IV. became furnished with his famous argument of the most safe course, the (Roman) Catholics affirming that there was no safety out of their communion, and the Calvinists admitting that it is possible to be saved out of theirs. It will be seen at the first glance that the question had been improperly stated by Sully; it was a matter not of faith only, but of good faith; and when in speaking of dying in the observance of the Decalogue, which forbids us to bear false witness, he advised the king to commit an act of fraud and hypocrisy, one-half of his argument overturned the other half. Clearly it could only carry conviction to a mind already convinced by reasoning of a totally different nature. Duplessis gave opposite advice, for he had seriously taken up the instruction of the king. He was desirous that the several points of religion should be discussed before him by the most celebrated doctors, and of recommencing in some manner the conference of Poissy. He invited each of the principal theologians of the Reformation to study one of the questions of controversy, in order that they might all come well armed before their adversaries. Henry IV., “the most cunning, and the most subtle prince in the world,” as Agrippa d’Aubigné, who had lived thirty years in his confidence, called him, permitted Mornay to take his own course, and enjoined him even to select his champions without delay.