First of all Superman, our Forum Rules require any material quoted from online or from a book must include a link to the source and/or the full title of the source material. Second the preexistence of Jesus as a heavenly entity is an assumption that denies the truth of the balance of Scripture. Third, if Jesus existed in glory as a heavenly entity based on this one verse then we can argue that all who are in Christ also preexisted with God in the beginning.
Romans 9:23-24
23 And He did so in order that He might make known the riches of His glory upon vessels of mercy, which He prepared beforehand for glory, 24 even us, whom He also called, not from among Jews only, but also from among Gentiles. NAS
God has glory, men have glory with God, angels have glory with God. So what is the Biblical meaning of glory? Glory has three meanings depending on the context of the passage. God's glory is His moral power and righteousness, man's glory is the result of God's foreordained plan. The Lord's glory is how God honored His Son before He was born and exceeds man's glory. The Lord's glory preexisted creation as God's predetermined plan and is based on God's foreknowledge not only of the plan but the person who would be His instrument for the accomplishment of His plan.