In reply to the attempts made, more particularly in the days of Protestant orthodoxy in the sixteenth century, to compare the rapid spread of Protestantism with the miracle of the rapid propagation of Christianity in early days, it has rightly been pointed out, that the comparison is a lame one; the Church of Christ spread because her moral power enabled her to impose on a proud world mysteries which transcend all human reason; on a world sunk in every lust and vice a moral law demanding a continual struggle against all the passions and desires of the heart; her conquest of the world was achieved without secular aid or support, in fact, in the very teeth of the great ones of the earth who for ages persecuted her; yet during this struggle she laid her foundations in the unity of the one faith and one hierarchy; her spread, then, was truly miraculous. Luther, on the other hand, so his opponents urged, by his opposition to ecclesiastical authority and his principle of the free interpretation of Scripture, was casting humility to the winds and setting up the individual as the highest authority in matters of religion; thanks to his “evangelical freedom” he felt justified in deriding as holiness-by-works much that in Christianity was a burden or troublesome; on the other hand, by his doctrine of imputation, he cast the mantle of Christ’s righteousness over all the doings and omissions of believers; from the very birth of his movement he had sought his principal support in the favour of the Princes, whom, in due course, he invested with supreme authority in the Church; the spread of Lutheranism was not the spread of a united Church, but, on the contrary, such was the diversity of opinions that Jacob Andreæ, a Protestant preacher, could say, in 1576, in a public address, that it would be difficult to find a pastor who held the same faith as his sexton.[439] From all this the Church’s sixteenth-century apologists concluded that the spread of Luther’s teaching was not at all miraculous. Concerning the miracle spoken of above, and miracles in general as proofs of the truth, Luther expresses himself in the third sermon on the Ascension, embodied in his Church-postils. The occasion was furnished by the words of Our Lord: “These signs shall follow those who believe” (Mark xvi. 17), and by the pertinent question addressed to him by the fanatics and other opponents: Where are your miracles?