Passage
Let not your heart be troubled: ye beleeue in God, beleeue also in me.
Let not your heart be troubled: ye beleeue in God, beleeue also in me.
John 14:1 Let not your heart be troubled: ye beleeue in God, beleeue also in me.
John 14:2 In my Fathers house are many dwelling places: if it were not so, I would haue tolde you: I go to prepare a place for you.
John 14:3 And if I go to prepare a place for you, I wil come againe, and receiue you vnto my selfe, that where I am, there may ye be also.
The verse centers on "heart", "troubled", and "beleeue". It is saying that the verse draws attention to "heart" and "troubled", so its meaning should be read from those terms before moving to application.
The next verse adds "In my Fathers house are many dwelling...", so "heart" and "troubled" should be read forward into that movement. 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 "heart" and "troubled" with trust shaped by these words, not by a vague optimism outside the passage.