It is not often that G-D rebukes Moshe; however Rashi believes that in the beginning of this week's Parsha we read of just such an occasion.  The Torah tells us "And God spoke unto Moses, and said unto him: 'I am the LORD; and I appeared unto Abraham, unto Isaac, and unto Jacob, as God Almighty, but by My name G-D, made Me not known to them." Rashi explains that G-D was lamenting the loss of our patriarchs. Each of them was faced with singular and devastating challenges yet none of them ever questioned G-D's existence. They each bore their challenge with unquestioned faith and trust and never asked Me what my name is. Yet, G-D complains, when I appeared to you, immediately you asked Me