But the hour comes, and now is, when the true worshippers will worship the Father in spirit and truth, for the Father seeks such to be his worshippers.
A third view is that "spirit" refers to the heart and "truth" refers to the Scriptures. The meaning then is that worshippers must be sincere and worship God in harmony with His self-revelation in Scripture. This is good advice, but again the context suggests a slightly different meaning of "truth" here.