The more obvious interpretation of ἐσφράγισεν in John vi. 27, would be sealed with a mark of approval, as in the miracle just performed.  cf. Bengel, “sigillo id quod genuinum est commendatur, et omne quod non genuinum est excluditur.”  But St. Basil explains “sealed” by “stamped with the image of His Person,” an interpretation which Alfred rejects.  St. Basil at the end of Chapter xxvi. of this work, calls our Lord the χαρακτὴρ καὶ ἰσότυπος σφραγίς, i.e., “express image and seal graven to the like” of the Father.  St. Athanasius (Ep. i. ad Serap. xxiii.) writes, “The seal has the form of Christ the sealer, and in this the sealed participate, being formed according to it.”  cf. Gal. iv. 19, and 2 Pet. i. 4.