There is something of the immortal in an echo, for example: we can easily imagine an ultimate state of reverberation—a space where everything that has ever happened continues to exist—the end of time, where everything is live, perpetually present.

Bill Viola
Bryce Wilner

Viola, Bill, “The Sound of One Line Scanning”, Reasons for Knocking at an Empty House: Writings 1973–1994 (Cambridge: MIT Press, 1999), pp. 157.