Here Jesus does seem to be saying that with a proper amount of faith, one need not die. And of course, since Jesus says that faith as small as a mustard seed can accomplish the placement of a mountain into the sea, it does seem possible to forestall or perhaps completely eliminate death.
Nevertheless, in this context, we find Jesus comforting Martha, who has just lost her brother Lazarus to the grave. Martha has confirmed to her Lord that she knows He can ask anything of God the Father and it will be done. She also acknowledges that Lazarus will rise “at the resurrection on the last day.” (John 11:24) Jesus tells her that she need not wait. Lazarus will rise from the dead now. Jesus confirms His power over death; that the grave is incapable of holding those who belong to Christ.
Mary, the sister of Martha, also acknowledges that if Jesus had been present, Lazarus would never have died.
Seeing Mary’s sadness, Jesus weeps for her, for Martha, for Lazarus and I do believe for Himself — for He has lost a good friend and brother.
Jesus commands that the stone be removed; then He prays. “Did I not tell you that if you have faith you will see the glory of God?” (John 11:40) He commands Lazarus to “Come forth.” (John 11:43) Lazarus obeys, walking out of his grave.
Jesus commands, “Loose him; let him go.” (John 11:44) Death releases its captive.