αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
mi:
I Dat. from ego.—
II Voc. from meus; v. h. vv.
(1) mī, voc. sing. m. de meus.
(2) mī, synér. poét., pour mihi.