John 14:1-4

^A “hearts” = kardia. Literally the heart, but figuratively mind, character, inner self, will, intention, thoughts, feelings. Also, the center of something. The word heart is only used figuratively in the Old and New Testaments. This is where “cardiac” comes from.
^B “be troubled” = tarasso. 18x in NT. This is trouble, agitate, stir up. It is motion back and forth, creating inner turmoil or confusion, roiling water.
^C “believe” = pisteuo. From pistis (faith, faithfulness, belief, trust, confidence; to be persuaded or come to trust); from peitho (to have confidence, urge, be persuaded, agree, assure, believe, have confidence, trust). This is to believe, entrust, have faith it, affirm, have confidence in. This is less to do with a series of beliefs or doctrines that one believes and more to do with faithfulness, loyalty, and fidelity. It is trusting and then acting based on that trust.
^D “God” = theos. From Proto-Indo-European origins, meaning do, put, place. This is God or a god in general.

^E “house” = oikia. From oikos (house – the building, the household, the family, descendants; the temple). This is a house, household, goods, property, family, or means.
^F “dwelling places” = mone. 2x in NT. From meno (to stay, remain, wait, await, continue, abide, endure; to literally stay in a place or to remain in a condition; to continue with hope and expectation). This is an abode, lodging, or residence. It is the act of abiding or the place in which one abides.
^G “go” = poreuomai. From poros (ford, passageway). This is to go, travel, journey, or die. It refers to transporting things from one place to another and focuses on the personal significance of the destination.
^H “know” = eido. This is to know, consider perceive, appreciate, behold, or remember. It means seeing with one’s eyes, but also figuratively, it means perceiving – seeing that becomes understanding. So, by implication, this means knowing or being aware.
^I “way” = hodos. This is way, road, path, or journey. It can imply progress along a route.
^J “going” = hupago. From hupo (by, under, under the authority of) + ago (lead, bring, guide, spend, drive, carry). This is to lead under so to depart, go away, or die. It is to lead away under the command of someone else, being given a mission or objective to carry out.