en_tn/heb/12/23.md

the firstborn

This speaks of believers in Christ as if they were firstborn sons. This emphasizes their special place and privilege as God's people. (See: rc://en/ta/man/jit/figs-metaphor)

who have been registered in heaven

"whose names are written in heaven." This can be stated in active form. Alternate translation: "whose names God has written in heaven" (See: rc://en/ta/man/jit/figs-activepassive)

who have been made perfect

This can be stated in active form. Alternate translation: "whom God has made perfect" (See: rc://en/ta/man/jit/figs-activepassive)