16 This conversation of well-doing, of perseverance in well-doing, of hoping for rewards above, of the secret dispensation of the grace of God, in wisdom not in foolishness, nor yet in finding fault, because one man is after this manner and another after that; for “there is no iniquity with God;” apply this, I say, if you think good, also to the Cross of your Lord. For it was not without a meaning that He chose this kind of death, in whose power it was even either to die or not.
Now if it was in His power to die or not, why was it not in His power also to die in this or the other manner! Not without a meaning then did He select the Cross, whereby to crucify you to this world. For the “breadth” is the transverse beam in the cross where the hands are fastened, to signify good works. The “length” is in that part of the wood which reaches from this transverse beam to the ground. For there the body is crucified and in a manner stands, and this standing signifies perseverance.
Now “the height” is in that part, which from the same transverse beam projects upward to the head, and hereby is signified the expectation of things above. And where is the “depth” but in that part which is fixed in the ground? For so is the dispensation of grace, hidden and in secret. It is not seen itself, but from thence is projected all that is seen. After this, when you shall have comprehended all these things, not in the mere understanding but in action also (“for a good understanding have all they that do hereafter),” then if you can, stretch out yourself to attain to the knowledge of the “love of Christ which passes knowledge.”
When you have attained to it, you “will be filled with all the fullness of God.” Then will be fulfilled the “face to face.” Now you will be filled with all the fullness of God, not as if God should be full of you, but so that you shall be full of God. Seek there, if you can, for any bodily face. Away with such trifles from the eye of the mind. Let the child cast away his playthings, and learn to handle more serious matters. And in many things we are but children; and when we were more so than we are, we were borne with by our betters. “Follow peace with all men, and holiness, without which no man shall see God.” For by this is the heart purified; for that in it is that faith “which works by love.” Hence, “Blessed are the pure in heart, for they shall see God.”
Source: Sermons on Selected Lessons of the New Testament (New Advent)