The Persian Cross

A Persian Cross as they are found in
old Syrian churches in South India venerated as the Life - giving Cross.
Its power is symbolized by the Holy Spirit in the form of a dove that
kisses its summit, and by the four rivers of living water which, like the
four rivers of Paradise, flow from its foundation to the four quarters of
the world. This Cross is found in the church on Saint Thomas Mount,
Madras. It is carved on a granite slab of about two feet square, in the
centre of an arch resting on two pillars. The inscription on the arch, not
yet deciphered, is believed to be in old Sanskrit of Persia. But the
characters are described as Sassanian - Pahlavi, generally dated of the
7th or 8th century.
Though this is a Persian Cross, it is now more generally and quite
rightly called the cross of the Saint Thomas Christians, because today it
is preserved only in their churches. Archaeologists attribute this
representation of the Cross to the 6th or 7th century, and this is
confirmed by the Liturgy of the Syrian Churches in which, at this time,
flourished a theology of the Lige- giving Cross. Indeed the Mystery of the
Exaltation of the Cross is honored during a whole season of the year of
grace, the last of the seven seasons of seven Sundays. It is praised as
the renewal and fulfillment of all the mysteries:
God of gods, You called the earth from the rising of the sun to its
setting to the worship of the Cross, and from Jerusalem, by the passion
You endured in the flesh, You revealed the glory of our faith... By a
feeble piece of wood, You made the earth heaven You made the children of
men mingle with the angels and gave them the knowledge of the truth and
established the Holy Church. Bu the Life - giving Cross You renew all the
festivals of our Lord, sign ourselves with it upon our faces and we find
our glory in You, Christ, Saviour of all. (First Sunday after the
Exaltation of the Cross, PWHS IV, 397)
In theology, the bold symbolism of the Tree of Life is applied not only
to the Cross but also to Jesus Himself:

Christ our God, Your are the Tree of Life planted in the living source,
the Father, the source that never fails. Make us worthy to approach You
and to receive from You the fruits of Life the gifts of the Holy Spirit.
Grant us to take our delight in them, You who are gracious, generous and
compassionate and we will praise You with Your Father and Your Holy
Spirit, now and always and for ever. (Third Sunday after the Epiphany of
our Lord, PWHS II, 179).
We recognize You as the Tree of Life and the Immortal Fruit which You
Yourself made to grow as a sign in the middle of Paradise. For the Cross
is the giver of life and the sower of peace, the uprooter of error and the
destroyer of sin, the sign of victory and the token of redemption.. And
while the eyes of our hearts are enlightened by the bright rays of the
Mystery of the Holy Cross, we are renewed spiritually in our thoughts and
in our understanding. (Fourth Sunday after the Exaltation of the Cross,
PWHS IV, 432)