I'll look into that, Jehanne. I suspect it's not as simple as you're making it out to be, or else this argument wouldn't be happening all over the web, but I hope that it is. You also didn't give me a link.
Geesh. This is all of the Internet:
http://www.ewtn.com/library/councils/Florence.htm#3 (Scroll down to Session 8)
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Whoever wills to be saved, before all things it is necessary that he holds the catholic faith. Unless a person keeps this faith whole and undefiled, without doubt he shall perish eternally. The catholic faith is this, that we worship one God in the Trinity, and the Trinity in unity, neither confounding the persons nor dividing the substance. For there is one person of the Father, another of the Son, and another of the holy Spirit. But the Godhead of the Father, of the Son and of the holy Spirit is one, the glory equal, and the majesty co-eternal. Such as the Father is, such is the Son, and such is the holy Spirit. The Father uncreated the Son uncreated and the holy Spirit uncreated. The Father infinite, the Son infinite and the holy Spirit infinite. The Father eternal, the Son eternal and the holy Spirit eternal. Yet they are not three eternals, but one eternal. As also they are not three uncreateds nor three infinites, but one uncreated and one infinite. Likewise the Father is almighty, the Son is almighty and the holy Spirit is almighty. Yet they are not three almighties, but one almighty. Likewise the Father is God, the Son is God and the holy Spirit is God. Yet they are not three gods, but one God. Likewise the Father is Lord, the Son is Lord and the holy Spirit is Lord. Yet they are not three lords, but one Lord. For just as we are compelled by the Christian truth to acknowledge each person by himself to be God and Lord, so we are forbidden by the catholic religion to say there are three gods or three lords. The Father is made by none, neither created nor begotten. The Son is from the Father alone; not made nor created, but begotten. The holy Spirit is from the Father and the Son; not made nor created nor begotten, but proceeding. So there is one Father, not three fathers; one Son, not three sons; one holy Spirit, not three holy spirits. And in this Trinity nothing is before or after, nothing is greater or less; but the whole three persons are co-eternal together and co-equal. So that in all things, as has been said above, the unity in Trinity and the Trinity in unity is to be worshipped. Whoever, therefore, wishes to be saved, let him think thus of the Trinity.
It is also necessary for salvation to believe faithfully the incarnation of our lord Jesus Christ. The right faith, therefore, is that we believe and confess that our lord Jesus Christ, Son of God, is God and man. God, of the substance of the Father, begotten before the ages; and man, of the substance of his mother, born in the world. Perfect God, perfect man, subsisting of a rational soul and human flesh. Equal to the Father according to his Godhead, less than the Father according to his humanity. Although he is God and man, he is not two, but one Christ. One, however, not by conversion of the Godhead into flesh, but by the taking of humanity into God. One altogether, not by confusion of substance, but by unity of person. For as a reasoning soul and flesh is one man, so God and man is one Christ. He suffered for our salvation and descended into hell. On the third day he rose from the dead. He ascended into heaven and sits at the right hand of God the Father almighty. Thence he shall come to judge the living and the dead. At his coming all shall rise again with their bodies, and shall give an account of their own deeds. Those who have done good shall go into eternal life, but those who have done evil shall go into eternal fire.
This is the catholic faith. Unless a person believes it faithfully and firmly, he cannot be saved."
Simple words which modernist heretics love to twist!