When Innocent came first to the Papacy his keen perception of the many vices of the Church was increased by a conviction that error of doctrine accompanied in certain portions of Christendom the general corruption of life. In some of his letters he comments severely, always with a reference to the special evils against which he struggled, on the causes and widening propagation of heresy. "If the shepherd is a hireling," he says, "and thinks not of the flock, but solely of himself: if he cares only for the wool and the milk, without defending them from the wolves that attack them, or making himself a wall of defence against their enemies: and if he takes flight at the first sound of danger: the ruin and loss must be laid to his charge. The keeper of the sheep must not be like a dumb dog that cannot bark. When the priesthood show that they do not know how to separate holy things from common, they resemble those vile wine-sellers who mingle water with their wine. The name of God is blasphemed because of those who love money, who seek presents, who justify the wicked by allowing themselves to be corrupted by them. The vigilance of the ministers of religion can do much to arrest the progress of evil. The league of heretics should be dissolved by faithful instruction: for the Lord desires not the death of a sinner, but rather that he should be converted and live." It may be curious also to quote here the cautious utterance of Innocent upon the pretension of the more pious sectarians to found everything on Scripture and to make the study of the Bible their chief distinction. The same arguments are still used in the Catholic Church, sometimes even in the same terms. "The desire to know the Holy Scriptures and to profit by their teaching is praiseworthy, but this desire must not be satisfied in secret, nor should it degenerate into the wish to preach, or to despise the ministers of religion. It is not the will of God that His word should be proclaimed in secret places as is done by these heretics, but publicly in the Church. The mysteries of the faith cannot be explained by every comer, for not every intellect is capable of understanding them. The Holy Scriptures are so profound that not only the simple and ignorant but even intelligent and learned men are unqualified to interpret them."