Paul gets credited with some strange doctrines apart from truth but he taught the truth also
“And the times of this ignorance God winked at; but now commandeth all men every where to repent:
Because he hath appointed a day, in the which he will judge the world in righteousness by that man whom he hath ordained; whereof he hath given assurance unto all men, in that he hath raised him from the dead.”
Acts 17:30-31 KJV
“For we must all appear before the judgment seat of Christ; that every one may receive the things done in his body, according to that he hath done, whether it be good or bad.
Knowing therefore the terror of the Lord, we persuade men;....
2 Corinthians 5:10-11 KJV
“And to you who are troubled rest with us, when the Lord Jesus shall be revealed from heaven with his mighty angels, In flaming fire taking vengeance on them that know not God, and that obey not the gospel of our Lord Jesus Christ:
Who shall be punished with everlasting destruction from the presence of the Lord, and from the glory of his power;”
2 Thessalonians 1:7-9 KJV
“Or despisest thou the riches of his goodness and forbearance and longsuffering; not knowing that the goodness of God leadeth thee to repentance?
But after thy hardness and impenitent heart treasurest up unto thyself wrath against the day of wrath and revelation of the righteous judgment of God;
Who will render to every man according to his deeds: To them who by patient continuance in well doing seek for glory and honour and immortality, eternal life:
But unto them that are contentious, and do not obey the truth, but obey unrighteousness, indignation and wrath, Tribulation and anguish, upon every soul of man that doeth evil, of the Jew first, and also of the Gentile;
But glory, honour, and peace, to every man that worketh good, to the Jew first, and also to the Gentile: For there is no respect of persons with God.”
Romans 2:4-11 KJV
so we have the law of liberty
“So speak ye, and so do, as they that shall be judged by the law of liberty.
For he shall have judgment without mercy, that hath shewed no mercy;
and mercy rejoiceth against judgment.”
James 2:12-13 KJV
Blessed are the merciful they will receive mercy