To revile something -- or "reproach," as it is often translated -- represents making a direct and deliberate attack on what is spiritually true, in an effort to destroy it.

(References: Apocalypse Explained 695 [19]; Arcana Coelestia 9221, 9222)

9221. 'You shall not revile God' means that God's truths are not to be blasphemed. This is clear from the meaning of 'reviling' as blaspheming; for blasphemers are those who revile. The reason why 'God's truths are not to be blasphemed' is meant is that in the internal sense 'God' means Divine Truth emanating from the Lord, and consequently when the subject in the Word is truth the Lord is called 'God', but when good is the subject He is called 'Jehovah', 2769, 2807, 2822, 3921 (end), 4287, 4402, 7010, 7268, 8988, 9160. And truths are therefore meant by 'angels', since they are recipients of God's truth from the Lord, 4295, 4402, 7268, 7873, 8192, 8301, 8867, and also by 'judges', 9160.