Passage
and every one who is living and believing in me shall not die--to the age;
and every one who is living and believing in me shall not die--to the age;
John 11:24 Martha saith to him, `I have known that he will rise again, in the rising again in the last day;'
John 11:25 Jesus said to her, `I am the rising again, and the life; he who is believing in me, even if he may die, shall live;
John 11:26 and every one who is living and believing in me shall not die--to the age;
John 11:27 believest thou this?' she saith to him, `Yes, sir, I have believed that thou art the Christ, the Son of God, who is coming to the world.'
John 11:28 And these things having said, she went away, and called Mary her sister privately, saying, `The Teacher is present, and doth call thee;'
The verse centers on "living", "believing", "shall", and "die--to". It is saying that the verse draws attention to "living" and "believing", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 25's "Jesus said to her I am the..." into verse 27's "believest thou this she saith to him...", so "living" and "believing" belong inside that flow. In John context, the local focus is the identity of Jesus, new birth, eternal life, and belief and unbelief.
A plain takeaway is to answer the verse's own emphasis on "living" and "believing" with trust shaped by these words, not by a vague optimism outside the passage.