The author uses an exclamation to emphasize that we should obey God the Father. This can be expressed as a statement. Alternate translation: "Therefore even more so, we should obey the Father of spirits and live." (See: [[rc://en/ta/man/jit/figs-exclamations]])
This idiom contrasts with "fathers in the flesh." Alternate translation: "our spiritual Father" or "our Father in heaven" (See: [[rc://en/ta/man/jit/figs-idiom]])