en_tn/1pe/02/09.md

a chosen people

You can clarify that God is the one who has chosen them. Alternate translation: "a people whom God has chosen" (See: rc://en/ta/man/translate/figs-activepassive)

a royal priesthood

Possible meanings are 1) "a group of priests who are also kings" or 2) "a group of priests who serve the king."

a people for God's possession

"a people who belong to God"

who called you out

"who called you to come out"

from darkness into his marvelous light

Here "darkness" refers to their condition as sinful people who did not know God, and "light" refers to their condition as people who do know God and practice righteousness. Alternate translation: "from a life of sin and ignorance of God to a life of knowing and pleasing him" (See: rc://en/ta/man/translate/figs-metaphor)