Contradiction with Psalm 103:8
Psalm 103:8 describes God as merciful and gracious, slow to anger, which contrasts with Jesus expressing frustration in Mark 9:19.
Psalm 103:8: The LORD [is] merciful and gracious, slow to anger, and plenteous in mercy. [plentious...: Heb. great in mercy]
Contradiction with James 1:19
James 1:19 encourages believers to be slow to anger, which contradicts Jesus showing impatience in Mark 9:19.
James 1:19: Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath:
Contradiction with Exodus 34:6
Exodus 34:6 portrays God as long-suffering, which is in contrast to the impatience shown in Mark 9:19.
Exodus 34:6: And the LORD passed by before him, and proclaimed, The LORD, The LORD God, merciful and gracious, longsuffering, and abundant in goodness and truth,
Contradiction with Proverbs 14:29
Proverbs 14:29 states that being slow to wrath is of great understanding, implying that quick anger, as seen in Mark 9:19, lacks wisdom.
Proverbs 14:29: [He that is] slow to wrath [is] of great understanding: but [he that is] hasty of spirit exalteth folly. [hasty...: Heb. short of spirit]
Contradiction with Colossians 3:12
Colossians 3:12 advises believers to be patient, which contradicts the impatience conveyed in Mark 9:19.
Colossians 3:12: Put on therefore, as the elect of God, holy and beloved, bowels of mercies, kindness, humbleness of mind, meekness, longsuffering;
Paradox #1
Mark 9:19 could be seen as presenting a contradiction in how it reflects frustration towards a lack of faith, despite the teachings of patience and understanding elsewhere in the Bible. This might appear inconsistent with the overall message of compassion and encouragement that Jesus promotes.