In the course of my intellectual life I experienced very acutely the problem of whether it isn't actually presumptuous to say that we can know the tr… - Benedict XVI

...when today as believers in our age we hear it said, a little enviously perhaps, that in the Middle Ages everyone without exception in our lands was a believer, it is a good thing to cast a glance behind the scenes, as we can today, thanks to historical research. This will tell us that even in those days there was the great mass of nominal believers and a relatively small number of people who had really entered into the inner movement of belief. It will show us that for many belief was only a ready-made mode of life, by which for them the exciting adventure really signified by the word credo was at least as much concealed as disclosed. This is simply because there is an infinite gulf between God and man; because man is fashioned in such a way that his eyes are only capable of seeing what is not God, and thus for man God is and always will be the essentially invisible, something lying outside his field of vision. ...

In other words, the New Covenant must be founded on an obedience that is irrevocable and inviolable. This obedience, now located at the very root of human nature, is the obedience of the Son, who made himself a servant and took all human disobedience upon himself in his obedience even unto death, suffered it right to the end, and conquered it.

Although the particular inclination of the homosexual person is not a sin, it is a more or less strong tendency ordered to an intrinsic moral evil, and thus the inclination itself must be seen as an objective disorder.