The Arians
admitted that the Son is in the Father, in the sense in which
all created things are in God. Basil (De Spiritu
Sancto, ch. 25, Orat. in Princip. evang. Joan.) takes
the preposition σύν, in, to express the idea
of the σύναφεια,
or conjunction of the two. The Scholiast on the present
passages calls attention to the two prepositions with and
in as denoting the Son’s eternal existence and His union
with the Father, as the shining is with the light, and
comes from it without separation. Basil, De Spir. Sancto,
ch. 26, holds it better to say that the Spirit is one with
(συνεῖναι)
the Father and the Son than that He is in (ἐνεῖναι) the Father and the
Son.