en_tn_lite_do_not_use/1co/07/17.md

as the Lord has given each one his portion

"as the Lord has assigned each one his life"

let each one walk as God has called him

"each one should live as he was when he became a Christian." Or 2) it is a metaphor for "commanded" or "instructed." Alternate translation: "each one should live as God has instructed him to" or "each one should follow God's commands as he lives his life"

This is my rule in all the churches

Paul was teaching believers in all the churches to act in this manner.