Q: Do you pray to the saints? Why do you not pray to
God only? Isn’t that idolarity?
A: The verb “to
pray” is problematic here because of the way people use and understand this
verb (not unlike “to worship”). According to a standard definition, the basic
meaning is to ask / to request humbly.

So, more
accurately, Orthodox Christians pray through the saints by asking them to pray
for us. The Orthodox understanding that that when we gather to celebrate the
Eucharist, we are also gathering with the whole Church — both the living and
the dead. All the generations of Orthodox Christians that came before us are
alive in Christ. Their personal presence is with us through the grace of God.
Thus, just as it would make sense for us to ask friends and family to pray for
us during times of distress and trial, so, too, is it natural for Orthodox
Christians to ask the saints to pray for us.
Idolatry is the
act of not referring something to the source, for instance honoring or
venerating something or someone with no intention of ultimately referring this
to the Holy Trinity and even more ultimately to God the Father.
Source: https://www.orthodoxanswers.org/do-you-pray-to-the-saints-why-do-you-not-pray-to-god-only-isnt-that-idolatry/
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