Contradiction with Galatians 1:1
Paul asserts he is an apostle "not of men, neither by man," which may imply a different source of apostleship than "by the commandment of God."
Galatians 1:1: Paul, an apostle, (not of men, neither by man, but by Jesus Christ, and God the Father, who raised him from the dead;)
Contradiction with 1 Corinthians 15:9
Paul refers to himself as the least of the apostles and not meet to be called an apostle, potentially contradicting the authority claimed in 1 Timothy 1:1.
1 Corinthians 15:9: For I am the least of the apostles, that am not meet to be called an apostle, because I persecuted the church of God.
Contradiction with 2 Corinthians 12:11
Paul claims he is not inferior to the "very chiefest apostles," indicating a humble acknowledgment which may seem in contrast to the authority conferred by the commandment in 1 Timothy 1:1.
2 Corinthians 12:11: I am become a fool in glorying; ye have compelled me: for I ought to have been commended of you: for in nothing am I behind the very chiefest apostles, though I be nothing.
Contradiction with Acts 1:21-22
This passage implies that apostles should have been with Jesus from John's baptism to the ascension, which might contradict Paul's apostleship timeline in 1 Timothy 1:1.
Acts 1:21-22: Wherefore of these men which have companied with us all the time that the Lord Jesus went in and out among us,
Contradiction with 2 Corinthians 11:5
Paul again states he is not a whit behind the very chiefest apostles, which can be seen as contradicting the idea of being appointed by direct commandment.
2 Corinthians 11:5: For I suppose I was not a whit behind the very chiefest apostles.
Contradiction with Romans 1:1
Paul describes himself as a servant called to be an apostle, focusing on calling and service, which can differ from the commandment aspect in 1 Timothy 1:1.
Romans 1:1: Paul, a servant of Jesus Christ, called [to be] an apostle, separated unto the gospel of God,