Parshas Vaeira begins with G-d informing Moshe, in response to Moshe's agonized appeal that his attempt to speak to Pharaoh had only worsened conditions for the Jewish people, that he is Hashem; וָאֵרָא, אֶל-אַבְרָהָם אֶל-יִצְחָק וְאֶל-יַעֲקֹב--בְּאֵל שַׁדָּי; וּשְׁמִי יְהוָה, לֹא נוֹדַעְתִּי לָהֶם and I appeared unto Abraham, unto Isaac, and unto Jacob, as El Shaddai, but by My name Hashem I did not reveal to them The question commonly asked of course is that we see many times when G-d did indeed address Avraham, Yitzchak and Yaakov as Hashem. Furthermore how does G-d answer Moshe by telling him this. To answer this we need to look at why Moshe is upset. Yes conditions have gotten worse for the Jews, but to our way of looking at it, this is only a temporary phenomenon soon to be relieved by the Exodus. Did Moshe Rabbeinu have so little faith that he had to challenge G-d on this score? To understand Moshe's problem, we have to remember that he had a different timetable...