When Rav Moshe Kordevero [the Ramak] was niftar [deceased] in Tzfat, he was the leading kabbalist of his generation, and he had many students. He authored many seforim [books] on Kabalah including the classic Mussar Sefer Tomer Devorah.
Before his passing, 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 Yitzchak Luria, better know as the Arizal.
After realizing that the Arizal saw the pillar, the people asked him to say a hesped [eulogy] on the niftar. The Arizal said that the pasuk says [Ki Teitzei 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 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 aveirot [sins], 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 [Tree of Knowledge]. For if not, this tzadik would have lived forever.