CCC 460 The Word became flesh to make us "partakers of the divine nature":78 "For this is why the Word became man, and the Son of God became the Son of man: so that man, by entering into communion with the Word and thus receiving divine sonship, might become a son of God."79 "For the Son of God became man so that we might become God."80 "The only-begotten Son of God, wanting to make us sharers in his divinity, assumed our nature, so that he, made man, might make men gods."81
It doesn’t say “one with God” and it goes beyond being “sons of God” because it said that in the previous sentence then went one step further. You cannot read it any other way.
Are Jesus and the Father and the Holy Spirit one? Of course:)
But, Jesus is not the Father, and the Father is not the Holy Spirit and so on and so one and so one....yet....they are one.
It is not the intent of this author to propose that we become God in the sense in which you think here.
I am not the right person to explain the theology behind it, and I don’t expect you to find and read the entire writing from which this quote comes.
I can only assure you that the church most emphatically does not teach that we can become God.
Think in terms of the psalmist and the poetry, metaphors and such that are used in the psalms.