en_tn_condensed/act/09/31.md

the church throughout all Judea, Galilee, and Samaria

This is the first use of the singular "church" to refer to more than one local congregation. Here it refers to all the believers in all the groups throughout Israel.

had peace

"lived peacefully." This means the persecution that started with the murder of Stephen was finished.

was built up

"God helped them grow" or "the Holy Spirit built them up"

walking in the fear of the Lord

"living in obedience to the Lord" or "continuing to honor the Lord"

in the comfort of the Holy Spirit

"with the Holy Spirit strengthening and encouraging them"