# saw the grace of God
"saw how God acted kindly toward the believers"
# he encouraged them
"he kept on encouraging them"
# to remain with the Lord
"to remain faithful to the Lord" or "to continue to trust in the Lord"
# with all their heart
Here the "heart" refers to a person's will and desire. Alternate translation: "with all their will" or "with complete commitment" (See: [[rc://en/ta/man/translate/figs-metonymy]])