Let us now proceed to that, which follows the prayer mentioned.

After the salutation, the Hierarch pours the oil upon the man fallen asleep. And remember, that during the sacred Birth from God, before the most Divine Baptism, a first participation of a holy symbol is given to the man initiated—the oil of Chrism--after the entire removal of the former clothing; and now, at the conclusion of all, the Oil is poured upon the man fallen asleep.
Then indeed the anointing with the Oil summoned the initiated to the holy contests; and now the Oil poured upon him shews the fallen asleep to have struggled, and to have been made perfect, throughout those same contests.
St. Dionysius the Areopagite