Thou, emphatic, and the negative interrogative particle implying a negative answer, thou art not surely greater.
Which is dead (ὁÌστις)
The compound pronoun ὁÌστις, which, is used explicatively, according to a familiar New Testament usage, instead of the simple relative. The sense is, seeing that he is dead. The compound relative properly indicates the class or kind to which an object belongs. Art thou greater than Abraham, who is himself one of the dead? So Col 3:5. “Mortify covetousness, seeing it is (ἡÌτις ἐστὶν) idolatry.†See on Mat 13:52; see on Mat 21:41; see on Mar 12:18; see on Luk 12:1; see on Act 7:53; see on Act 10:41; see on 1Pe 2:11.