We read the following in D&C 88:6:
He that ascended up on high, as also he descended below all things, in that he comprehended all things, that he might be in all and through all things, the light of truth;
We read further on the following:
The light which is in all things, which giveth life to all things, which is the law by which all things are governed, even the power of God who sitteth upon his throne, who is in the bosom of eternity, who is in the midst of all things.
So if to become the light of truth ?¢‚Ç¨‚Äù and thus the light in all things and which is the source of light ?¢‚Ç¨‚Äù Jesus had to descend below all things, where did light come from before his condescension? Certainly their was light before then.