Contradiction with Exodus 4:10
Moses claims he is not eloquent and is slow of speech, whereas Luke 21:15 promises believers a mouth and wisdom that adversaries cannot resist.
Exodus 4:10: And Moses said unto the LORD, O my Lord, I [am] not eloquent, neither heretofore, nor since thou hast spoken unto thy servant: but I [am] slow of speech, and of a slow tongue. [eloquent: Heb. a man of words] [heretofore: Heb. since yesterday, nor since the third day]
Contradiction with Jeremiah 1:6
Jeremiah expresses his inability to speak, citing youth, in contrast to the assurance given in Luke 21:15 of words and wisdom provided by God.
Jeremiah 1:6: Then said I, Ah, Lord GOD! behold, I cannot speak: for I [am] a child.
Contradiction with 1 Corinthians 2:1-4
Paul speaks of not using persuasive words of human wisdom, while Luke 21:15 suggests that believers will have words of wisdom.
1 Corinthians 2:1-4: And I, brethren, when I came to you, came not with excellency of speech or of wisdom, declaring unto you the testimony of God.
Contradiction with Exodus 6:12
Moses again doubts his ability to speak effectively to Pharaoh due to his inadequate speech, contradicting the promise in Luke 21:15.
Exodus 6:12: And Moses spake before the LORD, saying, Behold, the children of Israel have not hearkened unto me; how then shall Pharaoh hear me, who [am] of uncircumcised lips?
Contradiction with 1 Corinthians 1:17
Paul emphasizes preaching the gospel not with eloquence, contrary to Luke 21:15 which assures that believers will be given eloquent words.
1 Corinthians 1:17: For Christ sent me not to baptize, but to preach the gospel: not with wisdom of words, lest the cross of Christ should be made of none effect. [words: or, speech]
Contradiction with 2 Corinthians 10:10
Paul's letters are described as “weighty and powerful,” but his bodily presence as “weak,” differing from Luke 21:15's promise of compelling speech.
2 Corinthians 10:10: For [his] letters, say they, [are] weighty and powerful; but [his] bodily presence [is] weak, and [his] speech contemptible. [say they: Gr. saith he]
Paradox #1
The contradiction could be that it implies wisdom and words will be given directly by a higher power, yet people are expected to use their own judgment and reasoning to handle situations. This could conflict with the idea of personal responsibility and developing one's own understanding.