Passage
These things have I spoken unto you, while [yet] abiding with you.
John 14:25 (ASV)
Nearby Context
John 14:23 Jesus answered and said unto him, If a man love me, he will keep my word: and my Father will love him, and we will come unto him, and make our abode with him.
John 14:24 He that loveth me not keepeth not my words: and the word which ye hear is not mine, but the Father`s who sent me.
John 14:25 These things have I spoken unto you, while [yet] abiding with you.
John 14:26 But the Comforter, [even] the Holy Spirit, whom the Father will send in my name, he shall teach you all things, and bring to your remembrance all that I said unto you.
John 14:27 Peace I leave with you; my peace I give unto you: not as the world giveth, give I unto you. Let not your heart be troubled, neither let it be fearful.
Study Lenses
The verse centers on "things", "spoken", and "abiding". It is saying that the verse draws attention to "things" and "spoken", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 24's "He that loveth me not keepeth not..." into verse 26's "But the Comforter even the Holy Spirit...", so "things" and "spoken" 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 "spoken" with trust shaped by these words, not by a vague optimism outside the passage.