5. But from within (a priori) no human wisdom has been able to conceive what God is in himself, or in his internal essence. Neither can anyone know or give information of it except it be revealed to him by the Holy Spirit. For no one knoweth, as Paul says (1 Cor 2, 11), the things of man save the spirit of man which is in him; even so the things of God none knoweth save the Spirit of God. From without, I may see what you do, but what your intentions are and what you think, I cannot see. Again, neither can you know what I think except I enable you to understand it by word or sign. Much less can we know what God, in his own inner and secret essence is, until the Holy Spirit, who searcheth and knoweth all things, yea, the deep things of God--as Paul says above--reveals it to us: as he does in the declaration of this article, in which he teaches us the existence in the divine majesty of the one undivided essence, but in such manner that there is, first, the person which is called the Father; and of him exists the second person called the Son, born from eternity; and proceeding from both these is the third, namely, the Holy Spirit. These three persons are not distinct from each other, as individual brothers or sisters are, but they have being in one and the same eternal, undivided and indivisible essence. 6. This, I say, is not discovered or attained to by human reason. It is revealed from heaven above. Therefore, only Christians can intelligently speak of what the Godhead essentially is, and of his outward manifestation to his creatures, and his will toward men concerning their salvation. For all this is imparted to them by the Holy Spirit, who reveals and proclaims it through the Word. 7. Those who have no such revelation, and who judge according to their own wisdom, such as the Jews, Turks and heathen, must consider the Christian's declaration the greatest error and rankest heresy; they must say that we Christians are mad and foolish in imagining that there are three Gods, when, according to all reason--yea, even according to the Word of God--there can be but one God. It would not be reasonable, they will say, that there should be more than one householder over the same house, more than one lord or sovereign over the same government; much less reasonably should more than one God reign over heaven and earth. They imagine that thus with their wisdom they have completely overthrown our faith and exposed it to the derision and scorn of all the world. As if we were all blockheads and egregious fools and could not see their logic as well as they! But, thank God, we have understanding equal to theirs, and can argue as convincingly, or more so, than they with their Alkoran and Talmud, that there is but the one God.