‘O eternal Trinity, eternal godhead! This godhead, your divine nature, made immensely precious the blood of the only-begotten Son. Eternal Trinity, you are like a deep sea, in which the more I see, the more I find; and the more I find, the more I seek you. You fill the soul, yet somehow without satisfying it: In the abyss which you are you so fill the soul that it ever continues to hunger and thirst for you, desiring you, eager in your light to see you, who are the light.

With the light of my understanding, in your light I have tasted and seen the abyss which you are, eternal Trinity, and the beauty of your creation. Then looking at myself in you, I have seen that I am your image; this is a gift that I receive from you in your power, eternal Father, and in your wisdom, which is attributed to your only-begotten Son. The Holy Spirit who proceeds from you, Father, and from your Son has prepared me, giving me a will to love you.

Eternal Trinity, you are the Creator, I the creature. I have come to know, in the new creation you made of me in the blood of your Son, that you are in love with the beauty of your creature’.

from her Dialogue by St Catherine of Siena, 1347-1380

O merciful God, who gavest to thy servant Saint Catherine of Siena a wondrous love of the Passion of Christ: grant that, through her prayers; we thy people may be united to him in his majesty and rejoice for ever in the revelation of his glory; who liveth and reigneth with thee, in the unity of the Holy Ghost, ever one God, world without end. Amen. - Divine Worship: The Missal​