Thank you very much Maria and Xenondrum. Thanks for the pdf and the many references. I take note of all you said. Now just a few comments about Catholicism because is something which involves my feellings:
I agree with the critical comments from xenondrum. As I am old (60 years), I have seen the changes in the Catholicism happening in front of my face. Probably the corruption started before Vatican II, I don't know, but sure since that Concilie to our days the sacred sens of the rituals and prayers become weak and weak and finally seem to be lost (and I don't want to say nothing now about certain tendencies such as the "liberation theology" and other distortions that appeared after the council).
Xenondrum mentioned Orthodox icons, and Maria quoted the sacred chant... By contrast, I have seen Catholic churches decorated in a hyper modernist way that does not communicates anything sacred (sculptures showing shocking deformities, etc.). And I have listen to prayers chanted to the rythm of rock&pop melodies. As you said: as we pray we believe.
In this sens I agree in part with Lefebvre and others like him who want to return to "pre conciliar" times. But in other hand, I do not agree with them. Because when you refuse the changes just reacting, just going to the opposite way, the phariseeism is waiting for you in the next corner...
This is a very delicate thing. So I turned to Orthodox Church looking for a different path. A path far of both dangers: modernism corruption and phariseeism.
As for ecumenism, if it means "all the roads lead to God", of course I do not accept it. Because a basic learning of a real spirituality is that Devil and Evil exist. It does not matter here if one think on Devil as an individual being or on Evil as a cosmic state or a lack of love, or whatever, but it exist. Then not all what is connected with the "invisible" world is pure and good. In this sense some visions could be not only false but also devil. And the same is true for the rites and prayers.
Perhaps that seems old fashion but for me is nearest the truth than the "sweet" and indiscriminate ecumenism...
But if ecumenism means be open to others and try to see their hearts more than their formal belongings, so I agree with it. All of us were created as image and likeness, so an approach is allways possible.
Anyway, I am glad to have found this forum. I'll keep arround.