'Truth' in the Bible

(Before God, what I'm writing to you is the truth.)

To whom we gave place by subjection, no, not for an hour; that the truth of the gospel might continue with you.

But when I saw that they walked not uprightly according to the truth of the gospel, I said unto Peter before them all, If thou, being a Jew, livest after the manner of Gentiles, and not as do the Jews, why compellest thou the Gentiles to live as do the Jews?

O foolish Galatians, who hath bewitched you, that ye should not obey the truth, before whose eyes Jesus Christ hath been evidently set forth, crucified among you?

Am I therefore become your enemy, because I tell you the truth?

Ye did run well; who did hinder you that ye should not obey the truth?

But let those who receive instruction in Christian truth share with their instructors all temporal blessings.

From now on let no one trouble me [by making it necessary for me to justify my authority as an apostle, and the absolute truth of the gospel], for I bear on my body the branding-marks of Jesus [the wounds, scars, and other outward evidence of persecutions—these testify to His ownership of me].