Usually we would say that the prayers give us the teaching, although of course there are other opportunities to talk about whatever has gone on. I believe all of us East and West if we are sincely engaging in the services have more revealed to us all the time. This is all part of our own theosis/divinization.
You can read about the Vigil service here.
Here are the prayers the priest prays over the bread, oil, wine, wheat, which are included in that article:
O Lord Jesus Christ our God, Who didst bless the five loaves and didst therewith feed the five thousand: Do Thou, the same Lord, bless these loaves, wheat, wine and oil; and multiply them in this holy habitation, and in all the world; and sanctify all the faithful who shall partake of them. For it is Thou, O Christ our God, Who dost bless and sanctify all things; and unto Thee we ascribe glory: with the Father Who hath no beginning, and Thine all-holy, good, and life-crating Spirit, now and ever, and unto the ages of ages.
(I usually see the priest kiss the bread as well.)
I hope that helps.
Last week, after the akathist to St. John the Wonderworker was chanted before his holy relics we were all anointed by the Bishop, well he anointed the first group and then another priest took over, which is typical there, There was no blessing of the oil done then because we were anointed with the oil from the lampada that burns over St John’s incorrupt body there in the Cathedral, considered already blest by virtue of it being in the lamp with his holy relics. Such lampada oil is another means by which in the East an oil is considered blest.
This little girl seems quite intent on listening to the blessing Father is giving her before he traces a Cross on her forehead with the oil.