Passage
Even the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you.
John 14:17 (KJV)
Nearby Context
John 14:15 If ye love me, keep my commandments.
John 14:16 And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever;
John 14:17 Even the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you.
John 14:18 I will not leave you comfortless: I will come to you.
John 14:19 Yet a little while, and the world seeth me no more; but ye see me: because I live, ye shall live also.
Study Lenses
The verse centers on "Spirit", "world", "even", "truth", "receive", "seeth", "neither", and "knoweth". It is saying that the verse draws attention to "Spirit" and "world", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 16's "And I will pray the Father and..." into verse 18's "I will not leave you comfortless I...", so "Spirit" and "world" 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 "world" with trust shaped by these words, not by a vague optimism outside the passage.