The type of parallel construction represented in the verse 4 of Psalm 100 is synonymous parallelism, which is frequently used in the Psalms of the Bible. This rethoric device is used by<em> repeating an idea presented before but withdifferent words with the same meaning:</em>
I'd say the answer is 'the visible is more dangerous than the invisible', because Duncan never suspected that his faithful Macbeth would be the one to kill him.
