Intelligence is God's glory or His power. "The glory of God is intelligence." (D&C 93: 36.) This glory is also called "light and truth." (Id.) Or, in other words, light and truth emanates from God the Father, and is co-extensive with Him. This light and truth is also called intelligence. This is what conscience is made from. This is the power by which man comes into existence. It is as eternal as the Father Himself because it exists as part of His glory.
-comes from the Father, and
-causes everything to exist by its power.
Therefore, the "light of Christ," which is in and through all things, is co-extensive with the Father's "glory," or "intelligence," or in other words "light and truth." (D&C 93: 36.)