To one whose self is his body, death of the body is death of the self. But for one whose self is his love, awe and faith, there is no death, only a passing. From a state of confinement in the body, he makes the passage to liberation. He continues to work within this world, and even more so than before.
The Talmud says that Jacob, our father, never died. Moses, also, never died. Neither did Rabbi Judah the Prince. They were very high souls who were one with Truth in an ultimate bond—and since Truth can never die, neither could they.
Yes, in our eyes we see death. A body is buried in the ground, and we must mourn the loss. But this is only part of the falseness of our world. In the World of Truth, they are still here as before.
And the proof: We are still here. For if these high souls would not be with us in our world, all that we know would cease to exist.
What instrument can one play without the body?
Can one physically help another move without a body?
Can one hug another without freaking out the recipient without a body?
Can one entertain another without a body?
Can one paint a picture without a body?
These deeds need both the body and the soul(s) working together.
Instead of seeking the resurrection of the dead, perhaps we can reestablish our connection with the five souls including Adam Kadmon. And in spiritually reviving ourselves and friends also revive the righteous dead.