I apologize for the length of this - this is one of the ‘proofs’ from - a website arguing against the pre-existence of Jesus. I’m not sure how important the teaching is, one way or another - certainly for a sinner that is looking for relief from the burdens of sin, the teaching is not of any concern at the time. But we have some leisure, and can wrangle over things. 
6/. John 17:5. In John 17:5 we read the following –
And now, O Father, glorify thou me with thine own self with the glory which I had with thee before the world was.
To the untrained mind it sounds as though this verse is upholding the teaching that the Messiah pre-existed before his fleshly birth. But, by comparing the Greek text to the English translation and then letting OTHER SCRIPTURES interpret this scripture for us, it becomes very obvious that this scripture was also TAMPERED WITH – TWISTED to fit prevailing pagan concepts!
The New International Version Greek-English New Testament by Alfred Marshall, shows the Greek word for word translation of this verse:
5. and now glorify me thou, Father, with thyself…with the glory which I had before the world to be with thee.
The first word underlined and translated “I HAD” is the IMPERFECT FORM of the Greek word “echo” – word #2192 in Strong’s Greek Dictionary. This word means: to have to hold. However, Thayer’s Greek-English Lexicon of the New Testament shows this word to mean: TO HAVE IN STORE! Notice –
… to have a thing in readiness, have at hand, have in store:
Therefore, the word translated “I HAD” can – and should – have been translated “I AM TO HAVE.” This glory that the Messiah is said to have, is to be BEFORE the world TO COME.
The next word underlined – translated “BEFORE” – is word #4253 in Strong’s, and means: PREVIOUSLY; that is, “PREVIOUS” to the world TO COME –
4253. … pro, pro; a prim. prep.; “fore,” i.e. in front of, prior (fig. Superior) to:- above, ago, before, or ever. In comp. it retains the same significations.
The third word underlined – translated “TO BE” – is shown by A Critical Lexicon and Concordance to the English and Greek New Testament (by Ethelbert W. Bullinger) to mean “COME”:
elvai (pres. infinit.) to be, 33; be, 12; to have been, 1; have been, 1; that…am (art, is, are, be), 27; that…was (were), 10; had been, 1; that…may (might, should) be, 6; to be made, 1; come, 1.
Now let’s read this verse in the way that it should have been translated –
And now, O Father, You glorify me beside Your own self, with the glory which I AM TO HAVE with You BEFORE the world to come.
The Messiah was only asking YEHOVAH God to glorify him beside the Father – or at the right hand of YEHOVAH’s throne – with the glory that HE (YEHOVAH God) HAD IN STORE for him – BEFORE the Kingdom of God (YEHOVAH) and BEFORE the NEW WORLD that is to come.
The Messiah knew full well that he was to die and be resurrected by YEHOVAH God. He also knew that he was to be allowed to take his rightful place at the right side of YEHOVAH, and that is exactly what we find in the other scriptures that interpret this scripture. Notice Hebrews 1:1-3:
Therefore, holy brothers, partakers of the heavenly calling, consider the apostle (the one sent) and High Priest of our profession, Yeshua the Messiah; who was faithful to Him: YEHOVAH, Who BEGOT HIM, just as Moses was faithful in all his house. Now this one (the Messiah) was counted worthy of more GLORY than Moses, since he who has built the House of YEHOVAH has more honor than the House of YEHOVAH.
This GLORY was in fulfillment of Biblical prophecy – and this glory was only to BEGIN to take place in a certain time period. In the following verses we find written:
Hebrews 1:13: But to which of the angels has He (YEHOVAH) ever said: sit at my right hand – until I make your enemies your footstool?
Psalm 110:1: YEHOVAH said to my ruler and king: sit at my right hand, until I make your enemies your footstool.
1 Peter 1:11: Examining closely to what things, or what manner of season, which the spirit that was in them made clear to them, when it testified BEFOREHAND to the sufferings of Messiah, and the GLORY THAT WOULD FOLLOW.
1 Peter 5:1: The elders who are among you I exhort, who am also an elder, and a witness of the sufferings of the Messiah, and ALSO A PARTAKER of the GLORY THAT WILL BE REVEALED:
We must realize that we too can look forward to this SAME glory that the Messiah will receive. Just as the apostles looked forward to this glory, so should we. Notice 2 Peter 1:3:
As His holy power has granted to us all things that pertain to life and holiness, through the full knowledge of Him Who called US to GLORY and virtue.
This was the very glory that the Messiah was talking about – glory he knew he would receive because it was written in the prophets! He knew he would RECEIVE this glory AFTER HIS RESURRECTION – he did not have this glory before his human birth! Yeshua the Messiah, as the only BEGOTTEN son of YEHOVAH God, will always have the honor of being at his Father’s right hand – but he did not receive this honor (glory) until AFTER his resurrection!
The word translated “glory” is word #1391 in Thayer’s Greek-English Lexicon, and means:
2. magnificence, excellence, preeminence, dignity, a most glorious condition, most exalted state; a. of that condition with God the Father in heaven to which Christ was raised after he had achieved his work on earth: Lk. xxai. 26; Jn. xvii. 5
As the Bible says, the Messiah will receive his glory and then his enemies will be made his footstool. In 1 Corinthians 15:24-28 we clearly see that the last enemy that will be destroyed is DEATH – but we also can see that YEHOVAH God will always be exalted as THE SUPREME HEAD over ALL, even by Yeshua himself, who sits at YEHOVAH’s right hand –
Then the end, when he (the Messiah) will have handed over the Kingdom to YEHOVAH, to our Father, when he (the Messiah) will have destroyed every other rule, and every authority and power. For he (the Messiah) MUST REIGN until he has put all enemies under his feet. The last enemy that will be destroyed is death. For YEHOVAH has put all things under his feet. But when it says that everything has been put under him, it is clear that THIS DOES NOT INCLUDE YEHOVAH HIMSELF, Who put everything under Yeshua. When He has done this, then the son himself WILL BE SUBJECT TO HIM Who put all things under him, so that YEHOVAH may be acknowledged as THE SUPREME HEAD OVER ALL.
Clearly, when the Messiah appears on this earth again (as pictured in Revelation 10) he will have all authority to destroy all other rules, authorities and powers. He will reign on earth until he has put all enemies under his feet and then, when YEHOVAH’s Shekinah Glory returns to this earth (Revelation 19:11) to reside in the Temple built by the Messiah, the Messiah will hand all power over to Him and become subject to Him – acknowledging that YEHOVAH God is the SUPREME HEAD over ALL. Yeshua the Messiah will then become our High Priest, ministering to YEHOVAH his Father in the Temple of YEHOVAH God!
The Messiah was NOT speaking of “past glory”, nor of a “past life” – as count-less deceived people have believed. Unfortunately, people are deceived because of the pagan lies that the translators have inserted into the scriptures! The Messiah was speaking of the glory he WAS to RECEIVE after he was resurrected; the glory of the only BEGOTTEN son of the Father, full of mercy and truth!
The glory of being the ONLY begotten son of YEHOVAH – the FIRSTBORN from the dead, is the glory the Messiah has NOW, and will forevermore have! But – and let this sink in – the Messiah DID NOT have this glory previously, because he simply DID NOT EXIST before he was begotten by YEHOVAH God and born as a flesh and blood human being! Read 1 Peter 1:19-20:
But with the precious blood of Messiah, as of a lamb without blemish and without spot: who truly was foreordained before the foundation of the world, but was MANIFEST in these last times for you; who through him we do believe in YEHOVAH, who raised him up from the dead, and GAVE HIM GLORY; that your faith and hope might be in YEHOVAH.