Contradiction with Matthew 19:26
Matthew 17:16 suggests failure, while Matthew 19:26 states that with God, all things are possible, implying no failure.
Matthew 19:26: But Jesus beheld [them], and said unto them, With men this is impossible; but with God all things are possible.
Contradiction with Philippians 4:13
Matthew 17:16 shows inability, whereas Philippians 4:13 emphasizes strength through Christ that enables all things.
Philippians 4:13: I can do all things through Christ which strengtheneth me.
Contradiction with Mark 11:24
Matthew 17:16 reflects a lack of accomplishment, but Mark 11:24 assures that whatever you ask in prayer, believing, you shall receive.
Mark 11:24: Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive [them], and ye shall have [them].
Contradiction with John 14:13-14
Matthew 17:16 indicates failure to achieve, while John 14:13-14 promises that whatever is asked in Jesus' name will be done.
John 14:13-14: And whatsoever ye shall ask in my name, that will I do, that the Father may be glorified in the Son.
Contradiction with Luke 1:37
Matthew 17:16 describes an inability, but Luke 1:37 affirms that nothing shall be impossible with God.
Luke 1:37: For with God nothing shall be impossible.