This can be stated in active form. Alternate translation: "God has sanctified us" or "God has dedicated us to himself" (See: [[rc://en/ta/man/translate/figs-activepassive]])
The abstract noun "offering" can be expressed with the verb "offer" or "sacrifice." Alternate translation: "because Jesus Christ offered his body as a sacrifice" or "because Jesus Christ sacrificed his body" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])