23 Jesus said to her: “Your brother will rise again.”
24 Martha said to Him: “I know that he will rise again in the resurrection in the last day.
25 Jesus said to her: “I am the resurrection and the life; the person believing in Me will live, even if he should die.
Jesus states the certainty of the resurrection, and that Lazarus would be included in this.
Jesus had already spoken about the dead being raised: 28 Do not be amazed at this, because an hour is coming in which all those in the tombs will hear His voice
29 and those who have done good things will come out into a resurrection of life, but those who have practiced wickedness to a resurrection of judgement – John 5.28-29.
We live in a society where most people believe that when they die and leave this world they are going straight to Heaven. People often talk of their loved ones who have died being in Heaven and looking down on them and helping them.
This may be a comforting thought for the bereaved, but we need to know the truth of what Jesus is saying.
Jesus said that all the dead will be raised, because all will hear the voice of Jesus and be raised. We must understand that when Jesus said that all in the tombs would hear His voice, this would include those who have been cremated.
Jesus said that those who have believed in Him during their life on earth would be raised to eternal life. The doing good refers to an earthly life that is devoted to following Jesus, receiving Him as Lord and Saviour, and doing the good works that He has prepared for us before the world was created.
 God saved you by His special favour when you believed. And you can’t take credit for this; it is a gift from God.  Salvation is not a reward for the good things we have done, so none of us can boast about it.  For we are God’s masterpiece. He has created us anew in Christ Jesus, so that we can do the good things He planned for us long ago – Ephesians 2.8-10 (NLT).