Contradiction with James 1:5
While 2 Timothy 3:17 emphasizes that scripture equips a person for every good work, James 1:5 suggests that individuals may lack wisdom and need to ask God for it.
James 1:5: If any of you lack wisdom, let him ask of God, that giveth to all [men] liberally, and upbraideth not; and it shall be given him.
Contradiction with 1 Corinthians 2:14
2 Timothy 3:17 implies sufficiency of scripture for good works, whereas 1 Corinthians 2:14 indicates that spiritual understanding requires the Spirit, which might not be accessible to all through scripture alone.
1 Corinthians 2:14: But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know [them], because they are spiritually discerned.
Contradiction with Hebrews 5:12
2 Timothy 3:17 suggests that scripture equips one fully, but Hebrews 5:12 implies that believers might still require basic teachings and milk instead of solid food.
Hebrews 5:12: For when for the time ye ought to be teachers, ye have need that one teach you again which [be] the first principles of the oracles of God; and are become such as have need of milk, and not of strong meat.
Contradiction with John 14:26
While 2 Timothy 3:17 states scripture equips thoroughly, John 14:26 highlights the role of the Holy Spirit in teaching and reminding of Jesus' teachings.
John 14:26: But the Comforter, [which is] the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.
Contradiction with Romans 7:18
2 Timothy 3:17 expresses completeness in scripture, yet Romans 7:18 discusses the struggle of doing good despite knowing scripture, due to human nature.
Romans 7:18: For I know that in me (that is, in my flesh,) dwelleth no good thing: for to will is present with me; but [how] to perform that which is good I find not.