“Rabbi Tzadok of Lublin suggests that when Hashem tells Avraham ‘lech lecha,’ move from Charan and begin a new life in Eretz Yisrael, His command is also directed to each one of us. Sometimes we are comfortable living in a certain location or serving in a certain role in life, but when we are forced by circumstances to move or change our role, Hashem is indicating to us that He wants us to alter our trajectory and adopt a new role in life. In these cases, says Rabbi Tzadok, the command of lech lecha tells us to accept this as the Divine will even if we do not understand the reason for it.
Perhaps the same notion holds true concerning death. Upon the passing of an individual from this material world to the upper spiritual worlds, his soul (in particular if it is a spiritually elevated one), has the capability to empower us with guidance, divine spirit, and the spiritual energy to continue to forge the path that he or she began in this world, sometimes even more effectively than when they were still alive. The soul, in turn, may also benefit and raise the spiritual level to which it can achieve in the next world.
Although we cannot understand the reason for why a person dies at a particular time, we can be assured that Hashem is telling that individual: ‘Lech lecha – it is time to move on to the next world and continue to make your contribution from there, perhaps in an even greater fashion than you ever could have done in this world.'”