English: “Alive, all of you, today” — what is the force of “today”? Rather, even at a time when the whole world is dying, you are alive. What is the implication? Just as today you are all existing, so in the World to Come you will all exist. From here we have a source in the Torah for the resurrection of the dead.
On the daf / in context: Within the larger sugya of techiyas ha-meisim, the superfluous “hayom” is read as a comparison: the present vitality of those who cling to Hashem is a paradigm for their future vitality after death.
Type of Learning
R’ Eliezer #8 (from something superfluous) — diyuk of the extra word “hayom” as a source for resurrection.
What Is Learned
The phrase “alive… today” teaches that those who cling to Hashem will remain alive in the World to Come; it is one of the Torah sources for techiyas ha-meisim.