You have to analyze the quote a bit. Here’s a quote from a presentation by Fr. Michael Casey (an Australian Trappist) at the last World Oblate’s Congress in 2013, which may help a bit:
Whenever we pray the Angelus, we recite that solemn verse from the
Prologue of the Fourth Gospel: “The Word became flesh and dwelt among us”.This refers, of course, to God’s eternal Word becoming human and thus beginning to exist and act through the human nature that had been assumed. That is to say, within the constraining limits of space and time. The Word was present and active, but immediate in one place only,
and existing from moment to moment. The life-giving Word, the image of the unseen God, became flesh at one era in history and in a single geographical location. The infinite and eternalWord who dwells in inaccessible light became accessible in space and time.
Looking at the verse from John, let’s look at each line in turn:
*In the beginning was the Word, and the Word was with God, and the Word was God. *
In the “beginning” was the Word who was God. Thus he preceded creation. He was outside of the created realm that we live in.
He was in the beginning with God.
Christ existed, consubstantial with God, from the very beginning; Christ therefore is God, the God of creation. But we know Christ from a very specific period in time, when the Incarnated Word dwelt among us. As Fr. Casey says *within the constraining limits of space and time. *. Therefore Christ, consubstantial with God, transcends time, but did acquire our human nature for some 33 years within the constraining limits of space and time some 2000 years ago.
All things came into being through him, and without him not one thing came into being. What has come into being in him was life,[a] and the life was the light of all people. The light shines in the darkness, and the darkness did not overcome it.
Everything came through Him. Everything includes time as time, as it was pointed out elsewhere on this thread, is intrinsically tied to matter and matter is part of creation.
And the Word became flesh and lived among us,
In order to acquire our human condition and live among us, God became fully human while at the same time retaining his full divinity. However his humanity was constrained by time as it had to be; being human he had to obey the laws physics, biology, relativity, thermodynamics, etc. He lived among us in time. He was not a ghost or a spirit, but fully human living within and by the laws of nature. But the divine part of His nature preceded His human nature eternally and will continue eternally. He is God, so He existed prior to our material world as we know it, as He created it. This would include all the laws that govern our universe including time. He is the Supreme Lawmaker.
Since He was from before creation, He is eternal. He transcends time. Time is part of creation, and the human portion of His existence was constrained by time, with moment of birth, a moment of human death, and a life from moment to moment in between.
It’s hard to put it in words, because the Word transcends human words. As a priori says, He has his own nature. He existed before creation, and any attempt to elucidate that nature is impossible within the limitations of our human minds.