Contradiction with Proverbs 27:6
Proverbs 27:6 suggests that faithful are the wounds of a friend, which contrasts with the deceit and smoothness of words depicted in Psalm 55:21.
Proverbs 27:6: Faithful [are] the wounds of a friend; but the kisses of an enemy [are] deceitful. [deceitful: or, earnest, or, frequent]
Contradiction with James 3:9-10
This passage speaks to the contradictory nature of the tongue, both blessing and cursing, which highlights the duplicity described in Psalm 55:21.
James 3:9-10: Therewith bless we God, even the Father; and therewith curse we men, which are made after the similitude of God.
Contradiction with Proverbs 10:19
This verse emphasizes wisdom in few words, contrasting the setting of many smooth words to deceive, as in Psalm 55:21.
Proverbs 10:19: In the multitude of words there wanteth not sin: but he that refraineth his lips [is] wise.
Contradiction with Matthew 5:37
Jesus emphasizes simplicity and honesty in speech, contrasting with the deceitful words described in Psalm 55:21.
Matthew 5:37: But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.
Paradox #1
The moral conflict in Psalms 55:21 could be about the contrast between someone's pleasant words and their harmful intentions. This highlights a situation where someone appears to be trustworthy and kind outwardly, but their true motive is to cause harm, creating a conflict between appearance and reality.