Passage
The Jews therefore said unto him, Thou art not yet fifty years old, and hast thou seen Abraham?
The Jews therefore said unto him, Thou art not yet fifty years old, and hast thou seen Abraham?
John 8:55 and ye have not known him: but I know him; and if I should say, I know him not, I shall be like unto you, a liar: but I know him, and keep his word.
John 8:56 Your father Abraham rejoiced to see my day; and he saw it, and was glad.
John 8:57 The Jews therefore said unto him, Thou art not yet fifty years old, and hast thou seen Abraham?
John 8:58 Jesus said unto them, Verily, verily, I say unto you, Before Abraham was born, I am.
John 8:59 They took up stones therefore to cast at him: but Jesus hid himself, and went out of the temple.
The verse centers on "jews", "therefore", "said", "thou", "fifty", "years", and "hast". 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 56's "Your father Abraham rejoiced to see my..." into verse 58's "Jesus said unto them Verily verily I...", 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.