from correspondence of the Lubavitcher Rebbe
The essential attribute of Moses is self-nullification. This attribute of a true leader of the generation, of Moshiach himself. Although Moses is willing to give up everything for Torah, he is willing to give up even Torah itself for any Jew.
The true, inner essence of Moses – and of Moshiach – is revealed by an arousal of self-nullification for every Jewish soul, even the most distant one. Further, because the essence and being of Moses – and Moshiach – is one with the essence and being of every Jewish soul, this self-nullification – the attribute of Moshiach – reveals the quintessential unity and oneness of the Jewish people with G-d.
(Based on Likutei Sichos, by Dovid Yisroel Ber Kaufmann o.b.m.)