Paul writes a good number of times that he does not lie 'before God.' Now the things which I write unto you, behold, before God, I lie not.Galatians 1:20 The God and Father of our Lord Jesus Christ, which is blessed for evermore, knoweth that I lie not.2nd Corinthians 11:31 I say the truth in Christ, I lie not, my conscience also bearing me witness in the Holy Ghost.Romans 9:1
Why does Paul, who claims to be an apostle of Jesus Christ, have to state his case under oath with the name of God? Did Jesus forget to tell Paul in their supposed private sessions, Again, ye have heard that it hath been said by them of old time, Thou shalt not forswear thyself, but shalt perform unto the Lord thine oaths: But I say unto you, Swear not at all; neither by heaven; for it is God's throne: Nor by the earth; for it is his footstool: neither by Jerusalem; for it is the city of the great King. Neither shalt thou swear by thy head, because thou canst not make one hair white or black. But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.Matthew 5:33-37
Paul unashamedly disobeys Jesus in this area. It is as if Paul does not believe his readers would even believe him unless he mentioned Jesus as a witness. Instead, we would expect a true apostle to understand Jesus's simple words, follow them, and preach them, just as James did. But above all things, my brethren, swear not, neither by heaven, neither by the earth, neither by any other oath: but let your yea be yea; and your nay, nay; lest ye fall into condemnation.James 5:12
Paul does not agree with this, since Paul thinks he even has the authority to charge others by oaths to the Lord. I charge you by the Lord that this epistle be read unto all the holy brethren.1st Thessalonians 5:27
Value of this Evidence
This is indefensible evidence of Paul being a false apostle. A single mistake we can forgive, as humans are human and sin. But a repeated and sustained sin, in contradiction to the clear word of God, is not an acceptable stance for an apostle to take.