en_tn/1th/05/23.md

sanctify you completely

"set you apart" or "make you without fault so that you do not sin" (UDB)

your whole spirit, soul, and body

This is a parallelism where the terms spirit, soul, and body have similar meanings but are used here for emphasis. (See: rc://en/ta/man/translate/figs-parallelism)

be preserved without blame at

"be kept from sinning until"

Faithful is he who calls you

AT: "He is faithful who calls you" (See rc://en/ta/man/translate/figs-abstractnouns)

who will also do it

"who will be helping you"