http://revach.net/article.php?id=4724

Section: Parshas HaShavua   Category: Story
Parshas Ki Seitzei: The Arizal's Hesped For Rav Moshe Kordevero
When Rav Moshe Kordevero was niftar in Tzfas, he was the leading Mekubal of his generation, and he had many talmidim.  He authored many seforim on Kabalah including the classic Mussar Sefer Tomer Devora.  Before his petira, his talmidim asked him who they will learn with after he passes on.  He said the person who sees a pillar of fire above my Aron, he is the one who will lead you.  That person turned out to be a little known recent immigrant from Mitzrayim named Rav Yitzchok Luria, better know as the Arizal.

After realizing that the Arizal saw the pillar, the people asked him to say a hesped on the niftar.  The Arizal said that the pasuk says (Ki Seitzei 21:22),  וְכִי יִהְיֶה בְאִישׁ חֵטְא מִשְׁפַּט מָוֶת וְהוּמָת וְתָלִיתָ אֹתוֹ  עַל עֵץ," And if a man commits a sin worthy of death, he is put to death, and you should hang him on a tree."  The Arizal explained in Drush, that the word Ish means a tzadik.  The word "Chait" means lacking.  In other words if there is a tzadik whose actions do not warrant him to die because he has no aveiros, yet he dies anyway; וְתָלִיתָ אֹתוֹ עַל עֵץ, blame it on the tree.  His death was only because Adam and Chava ate from the Eitz HaDaas.  For if not, this tzadik would have lived forever.