For not without reason did He choose this kind of death, in order that He might be the master of breadth and length, and heighth and depth. For breadth lies in that cross piece of wood which is fastened from above. This belongs to good works, because on it the hands are outstretched. Length lies in that which is seen reaching from the former piece to the ground, for there in a certain manner we stand, that is, abide firm or persevere. And this is applied to longsuffering. Heighth is in that piece of wood which is left reaching upwards from that which is fixed across, that is, to the head of the Crucified; for the expectation of those who hope for better things is upward. Again, that part of the wood which is fixed hidden in the ground, signifies the depth of unrestrained grace.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: de Gr. Nov. Test. Ep. 140.