From pneuma; non-carnal, i.e. (humanly) ethereal (as opposed to gross), or (daemoniacally) a spirit (concretely), or (divinely) supernatural, regenerate, religious -- spiritual. Compare psuchikos.
KJV: It hath pleased them verily; and their debtors they are. For if the Gentiles have been made partakers of their spiritual things, their duty is also to minister unto them in carnal things.
NASB: Yes, they were pleased to do so, and they are indebted to them. For if the Gentiles have shared in their spiritual things, they are indebted to minister to them also in material things.
KJV: Which things also we speak, not in the words which man's wisdom teacheth, but which the Holy Ghost teacheth; comparing spiritual things with spiritual.
NASB: which things we also speak, not in words taught by human wisdom, but in those taught by the Spirit, combining spiritual thoughts with spiritual words.