because thou hast seen me, thou hast believed - words of measured commendation, but of indirect and doubtless painfully - felt rebuke: that is, ‘Thou hast indeed believed; it is well: it is only on the evidence of thy senses, and after peremptorily refusing all evidence short of that.’
blessed they that have not seen, and yet have believed - “Wonderful indeed and rich in blessing for us who have not seen Him, is this closing word of the Gospel” [Alford].