S. Basil died January 1, a.d. 379.  A serious illness, in addition to other causes, prevented S. Gregory from being present at his funeral (Epist. 79).  Benoît holds that an expression (Epitaph, cxix. 38) in which S. Gregory says that his “lips are fettered” proves that he was still in retirement at Seleucia.  This is an unwarranted deduction.  In this Oration, § 2, the Saint, alluding to his illness in disparaging terms, alleges his labours at Constantinople as a more pressing reason for his absence:  and says that he undertook the task according to the judgment of S. Basil.  This implies that S. Gregory went to Constantinople before the death of S. Basil, or that he had then been influenced by his friend’s advice and was on the point of setting out—more probably the former, as we may be sure that, if S. Gregory had been still at Seleucia, no reason but physical incapacity would have kept him from his friend’s side.  His pressing duties at Constantinople and the difficulties of the long journey were the “other causes” of his letter to S. Gregory of Nyssa:  and we know that he suffered from serious illness at Constantinople (Carm. xi. 887.  Orat. xxiii. 1).  S. Gregory left Constantinople in June, a.d. 381, and Tillemont places the date of this Oration soon after his return to Nazianzus.  Benoît thinks that it was probably delivered on the anniversary of S. Basil’s death.  The Oration, as all critics are agreed, is one of great power and beauty.  Its length (62 pages folio), the physical weakness of the speaker, and the limits of the endurance of even an interested audience, incline us to suppose that it was not spoken in its present form.  We cannot well set aside expressions which clearly point to actual delivery, but it may have been amplified later.