
Saint Gertrude is portrayed here iwth the Sacred Heart of Jesus resting within her own chest, and the inscription around it reads "In Gertrude's heart you will find Me."
Saint Gertrude:
"My lover, my lover, give me your blessing; flow out and let me in. From my heart, from my heart, I long for you, and I beg you, beloved of my heart, that I may be your own. Ah! That in your living love I may sprout out like a new spirituality like the lilies taht enjoy the water and the valley."
from II:12-17 in her Spiritual Exercises