This prayer of Catharine of Siena often comes to my mind. It is a brilliant integration of the Incarnation and the Atonement which grounds the events of Good Friday, this most weighty of events in Christian time.
And you, high eternal Trinity
acted as if you were drunk with love,
infatuated with your creature.
When you saw that this tree could bear no fruit
but the fruit of death
because it was cut off from you who are life,
you came to its rescue
with the same love
with which you had created it:
you engrafted your divinity
into the dead tree of our humanity.
O sweet tender engrafting!
You, sweetness itself,
stooped to join yourself
with our bitterness.
Catharine of Siena