3. But if—Yea, even if (as I grant is the case).
hid—rather (in reference to 2Co 3:13-18), "veiled." "Hid" (Greek, Col 3:3) is said of that withdrawn from view altogether. "Veiled," of a thing within reach of the eye, but covered over so as not to be seen. So it was in the case of Moses' face.
to them—in the case only of them: for in itself the Gospel is quite plain.
that are lost—rather, "that are perishing" (1Co 1:18). So the same cloud that was "light" to the people of God, was "darkness" to the Egyptian foes of God (Ex 14:20).