Passage
The Jews therefore said: Now we know that thou hast a devil. Abraham is dead, and the prophets: and thou sayest: If any man keep my word, he shall not taste death for ever.
The Jews therefore said: Now we know that thou hast a devil. Abraham is dead, and the prophets: and thou sayest: If any man keep my word, he shall not taste death for ever.
John 8:50 But I seek not my own glory: there is one that seeketh and judgeth.
John 8:51 Amen, amen, I say to you: If any man keep my word, he shall not see death for ever.
John 8:52 The Jews therefore said: Now we know that thou hast a devil. Abraham is dead, and the prophets: and thou sayest: If any man keep my word, he shall not taste death for ever.
John 8:53 Art thou greater than our father Abraham who is dead? And the prophets are dead. Whom dost thou make thyself?
John 8:54 Jesus answered: If I glorify myself, my glory is nothing. It is my Father that glorifieth me, of whom you say that he is your God.
The verse centers on "jews", "therefore", "said", "thou", "hast", "devil", "abraham", and "dead". It is saying that the verse draws attention to "jews" and "therefore", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 51's "Amen amen I say to you If..." into verse 53's "Art thou greater than our father Abraham...", so "jews" and "therefore" 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 "jews" and "therefore" with trust shaped by these words, not by a vague optimism outside the passage.