'Shame' in the Bible

But we have renounced the disgraceful things hidden because of shame; not walking in trickery or adulterating the word of God, but by stating the truth [openly and plainly], we commend ourselves to everyone’s conscience in the sight of God.

For if I have boasted to him at all concerning you, I was not disappointed. But just as everything we ever said to you was true, so our boasting [about you] to Titus has proved true also.

For even though I boast rather freely about the authority the Lord gave us for building you up and not for destroying you, I will not be ashamed [of the truth],