"his eye did not dim": This teaches us that the eye of the dead (with the exception of that of Moses) does dim.
"and his moisture lo nas": R. Eliezer b. Yaakov says: Read it not "his moisture did not depart, but "his moisture does not depart" — even now, ("lo nas" being susceptible of both readings). If one touched Moses' flesh (today), moisture would "blossom" from it.
(Ibid. 8) "And the children of Israel mourned Moses in the plains of Moav thirty days: and "and the days of the weeping of the mourning of Moses ended": "the days of weeping": two; "mourning": three.