So what is exactly the meaning of "ex cathedra" ? when does the pope speak as a doctor of all the christians ?

Technically you are, even though I'm not sure how binding it is since it doesn't concern Christian doctrine per se. We know for a fact that you can disagree on, for example, the death penalty because the Holy Office said so.

Denzinger 2313
[From the Encyclical, "Humani generis", August 12, 1950]

I suggest you read the whole encyclical.

What you are saying here surprises me. Please, confirm that you mean it!

But the social conditions change and the application of the moral teaching to specific matters is far from obvious in some cases. On the other hand, the changed social conditions have no effect on the dogmas.


Ok, I can see that this says something. Will I be correct if I say that the dogma about the papal infallibility means nothing more and nothing less than the following (the text in braces is a variant):

- The popes are given divine assistance so that they can faithfully expound the faith transmitted by the apostles. Whether or not a pope will make use of this divine assistance depends on whether he freely choses to do so [and whether the sinful dispositions he has (as a human being) allow him to make use of this divine assistance].

Ok thanks. That's interesting. I don't like all this centralization of the thought :/

Dogmas always stem from something the Church has always believed to be true. The Assumption of our Lady has always been believed to be true, but it was made a dogma in the mid 20th century by Pius XII who expounded it, clarified it and solemnly defined it.

This statement has been condemned by many popes. Change in social teaching is possible for those reasons, but not the moral teaching. For example, the Church has changed the stance on religious liberty and ecumenism, but not on abortion and contraception.

It's presumed that when a pope proclaims contraception a mortal sin in an encyclical, and that proclamation is in the spirit of tradition and what the Church has always taught, he does not err because that would mean the Church has erred.

its up to the church not a individual

The pope is infallible; but only when I agree with him

Sodomy is part of the dogma of fornication and adultery and abortion is one of the commandments. They are dogmas.

On your last point yeah kinda.
The central point is: declared dogmas aren't new doctrine. The Pope can't make up new doctrine because the doctrine of the Church was the same all along. The dogma of papal infallibily, the dogma of trinity, the assumption of Mary were always believed by every good Catholic.
Popes declare dogmas in order to tell us what is really truth and what we must believe unhesitatingly as catholics.
As a Catholic I can never say I don't believe Mary assumpted to heaven because the pope now explicitly said that that doctrine we all profess before is 100% correct and there's no room for personal opinions.

Actually early Christians were in for religious liberty since they actually needed that freedom to be catholics.
And although the recent document about it is pretty soft it still says that those that not hear to the Church will go to hell like those people that didn't hear to Peter and Paul.

One more thing I'd like to clarify
Imagine one day the Pope wakes up and Declares "infallibily" that being a faggot is mandatory. Assuming that he wouldn't have an instant heart attack, he wouldn't be able to declare it since the Pope doesn't have the power to declare new doctrines, since general revalation ended with the death of St. John the last Apostle.