Tree of Life by St. Bonaventure

“With Christ I am Crucified on the Cross” Epistle to the Galatians, chapter two.

The true worshipper of God and disciple of Christ, who desires to be perfectly conformed to the Savior of all men, crucified for his sake, must direct his efforts with the most diligent exercise of the mind unto this end: that he continually carry the cross of Christ Jesus as much in his mind as in his flesh, so that he may truly declare in himself the aforementioned words of the Apostle.

-from the prologue of St. Bonaventure