There
is a perfect Trinity, in glory and eternity and sovereignty, neither
divided nor estranged. Wherefore there is nothing either created or
in servitude in the Trinity; nor anything superinduced, as if at some
former period it was non-existent, and at some later period it was
introduced. And thus neither was the Son ever wanting to the Father,
nor the Spirit to the Son; but without variation and without change,
the same Trinity abideth ever.
–-
Saint
Gregory Thaumaturgus from a declaration of faith by Saint
Gregory