How could a bridge be constructed between the Domains?

And if they flee from these two (alternatives) to (the theory of) a bridge . . . [they are refuted] for when the sons of the Darkness bridged (?) the Great Abyss, to cross it. with what (did they make it) and how? And how did they bridge it ; for those who build a bridge fix (?) its foundations (lit., legs) on both sides as rivers show, or a deep which is bridged. Why. therefore, did they bridge it? And how were the Sons of the Darkness able without a bridge to ... their companions . . . or did they, perhaps, . . . cross the bridge . . . since they were on one side, and the Sons of the Light on the other side! And if that bridge was . . . the waste in the middle would make it useless. But if it was . . . it would not allow them to cross ; and thus the twisting of Mani has come to an end.