Passage
But because I speak the truth, you do not believe Me.
But because I speak the truth, you do not believe Me.
John 8:43 Why do you not understand what I am saying? It is because you cannot hear My word.
John 8:44 You are of your father the devil, and you want to do the desires of your father. He was a murderer from the beginning, and does not stand in the truth because there is no truth in him. Whenever he speaks a lie, he speaks from his own nature, for he is a liar and the father of lies.
John 8:45 But because I speak the truth, you do not believe Me.
John 8:46 Which one of you convicts Me of sin? If I speak truth, why do you not believe Me?
John 8:47 He who is of God hears the words of God; for this reason you do not hear them, because you are not of God.”
The verse centers on "speak", "truth", and "believe". It is saying that the verse draws attention to "speak" and "truth", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 44's "You are of your father the devil..." into verse 46's "Which one of you convicts Me of...", so "speak" and "truth" 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 "speak" and "truth" with trust shaped by these words, not by a vague optimism outside the passage.