Dvar Torah for Parshat VaYelekh

Based on Likutey Halakhot, Hilkhot Sheluchin 5:11

"While I am living in your midst you rebel against God. Certainly [that will be the case] after my death. Gather to me all the elders of your tribes...and I will warn them in the presence of heaven and earth. For I know that after I die you will act wickedly...."
(Deuteronomy 31:27-29)

Rashi points out that as long as Joshua was alive, the Jews did not act wickedly (Judges 2:7). He resolves the contradiction by saying that our verse is teaching us that as long as the disciple is alive, the teacher is considered alive. Reb Noson cites the Zohar (2:174a) which teaches that whenever the Torah says that a tzaddik (saint) died it is only from our point of view.

Thus, even when we see that a tzaddik is dead and buried, if there are people who study the tzaddik's teachings and teach them to others, then even from our point of view the tzaddik is not dead.