Passage
I have yet many things to say to you, but ye cannot bear them now.
John 16:12 (DBY)
Nearby Context
John 16:10 of righteousness, because I go away to [my] Father, and ye behold me no longer;
John 16:11 of judgment, because the ruler of this world is judged.
John 16:12 I have yet many things to say to you, but ye cannot bear them now.
John 16:13 But when *he* is come, the Spirit of truth, he shall guide you into all the truth: for he shall not speak from himself; but whatsoever he shall hear he shall speak; and he will announce to you what is coming.
John 16:14 He shall glorify me, for he shall receive of mine and shall announce [it] to you.
Study Lenses
The verse centers on "things" and "bear". It is saying that the verse draws attention to "things" and "bear", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 11's "of judgment because the ruler of this..." into verse 13's "But when he is come the Spirit...", so "things" and "bear" 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 "things" and "bear" with trust shaped by these words, not by a vague optimism outside the passage.