Passage
But when He, the Spirit of truth, comes, He will guide you into all the truth; for He will not speak from Himself, but whatever He hears, He will speak; and He will disclose to you what is to come.
John 16:13 (LSB)
Nearby Context
John 16:11 and concerning judgment, because the ruler of this world has been judged.
John 16:12 “I still have many more things to say to you, but you cannot bear them now.
John 16:13 But when He, the Spirit of truth, comes, He will guide you into all the truth; for He will not speak from Himself, but whatever He hears, He will speak; and He will disclose to you what is to come.
John 16:14 He will glorify Me, for He will take of Mine and will disclose it to you.
John 16:15 All things that the Father has are Mine; therefore I said that He takes of Mine and will disclose it to you.
Study Lenses
The verse centers on "Spirit", "truth", "comes", "guide", "speak", "himself", and "whatever". It is saying that the verse draws attention to "Spirit" and "truth", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 12's "I still have many more things to..." into verse 14's "He will glorify Me for He will...", so "Spirit" 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 "Spirit" and "truth" with trust shaped by these words, not by a vague optimism outside the passage.