Why were you searching for me?” he asked. “Didn’t you know I had to be in my Father’s house/Or be about my Father’s business
‘住處”指的是藉著聖靈的內住，我們與父神、耶穌基督、聖靈同住在一個靈裡。when Jesus was talking about his Father’s house, he was talking about his Spirit dwelling in the hearts of those who believe in him。
第一，耶穌沒有用天堂、或天家這詞，耶穌說的是’回到父那裡—-現在我往你那裡去(17:13上)，這等同於第14章耶穌說「在我父的家裡有許多住處；若是沒有，我就早已告訴你們了。我去原是為你們預備地方去。」(14:2)。”House” is the same as the “dwelling place” and the dwelling place of both the Father and the Son is man, for both Father and the Son will find a dwelling place in those who love Jesus and fulfil His commandments (John 14:23).
This can be taken as the point of interpretation of “house” and “rooms”: “house” is the entire mankind as a whole, community of human beings, the crown of creation, the only beings created as images of God and as potential inheritors of the Eternal Kingdom. But “rooms” are the individual human persons, individual human hearts, for all humanity is in fact the “house” of God, but not all “rooms” of this big “house” are open to His presence, for human free response to God is necessary, for God, respecting human freedom, does not “break into”, so to say, in those rooms/hearts, but waiting for the free response, stands at the door and knocks (Revelation 3:20); there is only one handle of this door, that inside the room, and only we can open it.
As to “I will go and prepare” phrase: this phrase is semantically the same as the phrase “it is better for you if I go, for unless I go the Paraclete will not come” (John 16:7); for unless Christ removed His corporeal and sensually tangible presence from the disciples, they would not have developed a loftier and more spiritual (that is to say, Holy Spirit-guided) understanding of the Messiah, as not a mere parochial politico-religious leader of Jewish nation, but as the universal Messiah of all humans; as not only an external teacher of enhanced and perfected divine commandments, but as God’s very inseparable Word through whom everything was created (John 1:1-3); as not only Him, who co-acts external-visible miracles with the Father, so that the Latter is absolutely unable to do anything without Him (no less than the sun is unable to enlighten without emitting rays) (John 5:19), but also as Him who starts to dwell within human hearts and work powerfully inside humans (Col. 1:29).
And now, as Paul says, in this new stage Christ is not known in a merely bodily way, as before, but already in a more elevated, spiritual way (2 Cor. 5-15). In fact, “going away” of Jesus, that is to say, His physical removal from the physical, habitual setting was in this way even necessary for the advent of the authentic Christianity, for had He remained on earth, there would have always been in the disciples the pernicious vestigial hope that Jesus would eventually become a powerful earthly King, making the disciples earthly ministers (Matt 20:21). Unless this vestigial hope was eradicated altogether, the Holy Spirit’s work in human heart would be blocked, and that is why by His Ascension Jesus removed Himself for good from any context of political-patriotic expectations of Jews, forcing as it were His disciples to cleanse their hearts from those blocks that prevented full-fledged divine presence in them.
Thus, His “going away” and “preparing rooms”, means that He will start a process of cleansing and nurturing human hearts through the advent of Holy Spirit to newer and greater preparedness for being a “dwelling place” of God. This process starts during the earthly life, but is not stopped by a physical death and continues to all eternity, for heart’s joyful growth in God never ends, and thus Christ eternally “prepares” human heart to a greater and greater intensity of divine presence in it, this sublime unending process being expressed by Pauline wording as “epektasis”, or “forgetting what was behind” and “straining/stretching oneself /ἐπεκτεινόμενος/ forward” (Philippians 3:13) to newer, yet unknown and unexperienced dimensions of divine presence, for “a star differs from a star by splendour” (1 Cor. 15:41), as does an angel from an angel and a saint from a saint.
Just as a post scriptum: not only the Father and the Son will abide eternally in heart of a God-loving person, but, as briefly noted above, also the Holy Spirit, of whom the temple human being is (1 Cor. 3:16).