This is the second item for which Paul prays that God will "grant" the Ephesians "according to the riches of his glory." The first is that they would "be strengthened" ([Ephesians 3:16](../03/16.md)).
Here "heart" represents a person's inner being, and "through" expresses the means by which Christ lives within the believer. Christ lives in the hearts of believers because God graciously allows them to have faith. Alternate translation: "that Christ may live within you because you trust in him" (See: [[rc://en/ta/man/translate/figs-metonymy]])
Paul speaks of their faith as if it were a tree that has deep roots or a house built on a solid foundation. Alternate translation: "that you will be like a firmly rooted tree and a building built on stone" (See: [[rc://en/ta/man/translate/figs-metaphor]])