Acts
3:21 reads as follows in the KJV:
Whom the heaven must receive until the
times of restitution of all things, which God hath spoken by the mouth of all
his holy prophets since the world began.
The
phrase “until the times of” is ἄχρι (as far as) coupled iwth χρόνων (genitive
plural masculine of the noun χρονος). As
discussed in
Responding to "Mormons teach Jesus came many times",
in
light of texts such as Acts 23:11, this does not mean that Jesus will remain in
heaven 24/7 without any sporadic physical appearances on the earth, but will
remain, for the most part, in heaven, until the “restitution of all things.” Consider
the following examples of αχρι coupled
with a noun in the genitive:
And he smote them form Aroer, even
till thou come (ἕως ἐλθεῖν ἄχρις Αρνων) to Minnith, even twenty cities, and
unto the plain of the vineyards, with a very great slaughter. Thus the children
of Ammon were subdued before the children of Israel. (Judg 11:33)
And when they had gone through the
isle unto Paphos (ἄχρι Πάφου), they found a certain sorcerer, a false prophet,
a Jew, whose name as Berjesus (Acts 13:6—they hardly did a non-stop trip
without any breaks, etc)