Passage
concerning sin indeed, because they do not believe in me;
concerning sin indeed, because they do not believe in me;
John 16:7 `But I tell you the truth; it is better for you that I go away, for if I may not go away, the Comforter will not come unto you, and if I go on, I will send Him unto you;
John 16:8 and having come, He will convict the world concerning sin, and concerning righteousness, and concerning judgment;
John 16:9 concerning sin indeed, because they do not believe in me;
John 16:10 and concerning righteousness, because unto my Father I go away, and no more do ye behold me;
John 16:11 and concerning judgment, because the ruler of this world hath been judged.
The verse centers on "concerning", "indeed", and "believe". It is saying that the verse draws attention to "concerning" and "indeed", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 8's "and having come He will convict the..." into verse 10's "and concerning righteousness because unto my Father...", so "concerning" and "indeed" 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 "concerning" and "indeed" with trust shaped by these words, not by a vague optimism outside the passage.