This is faaaantastic!! Rav Binyamin Eisenberger Shlita, a very popular Rov in Boro Park:
Yitzchak was Middas Ha-gvurah which is finding the light in the darkness. That is why he defends us when we are accused of being sinful. And that is why his bracha is tchiyas hameisim - Not only did he himself have tchiyas hameisim at the Akeidka but the notion of tchiyas hameisim is seeing that the dead weren't really dead after all. Watch as they come back to an even more powerful existence. THAT is light from darkness.
