Found this related quote:
St. Catherine of Siena
expresses this entire mystery in a little effusive prayer:
O Trinity! Eternal Trinity! O, Fire, abyss of Love!
Would it not have been enough to create us after your own image and likeness,
causing us to be re-born through grace and by the Blood of Your Son?
Was it still necessary that You should give us even the Holy Trinity as food for our souls?
Yes, Your love willed this, O Eternal Trinity.
You gave us not only Your Word through Redemption and in the Eucharist.
But You also gave us Yourself in Your fullness of love for Your creature.
Truly the soul possesses You Who are the supreme Goodness.