No man is more disgusted than I am with the ambition, the avarice, and the profligacy of the priests, not only because each of these vices is hateful in itself, but because each and all of them are most unbecoming in those who declare themselves to be men in special relations with God, and also because they are vices so opposed to one another, that they can only co-exist in very singular natures.
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

“Some were avowed free-thinkers, though even these usually received extreme unction, making peace with the Church when they felt death approaching. Most of them were impressed by the wickedness of contemporary popes, but were nevertheless glad to be employed by them. Guicciardini the historian wrote in 1529: “No man is more disgusted than I am with the ambition, the avarice, and the profligacy of the priests, not only because each of these vices is hateful in itself, but because each and all of them are most unbecoming in those who declare themselves to be men in special relations with God, and also because they are vices so opposed to one another, that they can only co-exist in very singular natures. Nevertheless, my position at the Court of several popes forced me to desire their greatness for the sake of my own interest. But, had it not been for this, I should have loved Martin Luther as myself, not in order to free myself from the laws which Christianity, as generally understood and explained, lays upon us, but in order to see this swarm of scoundrels put back into their proper place, so that they may be forced to live either without vices or without power.”*” source