'Man's' 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 we walk by faith, not by sight [living our lives in a manner consistent with our confident belief in God’s promises]—

so that we may preach the gospel even in the lands beyond you, but not to boast in work already accomplished in another one’s field of activity.

On behalf of such a man [and his experiences] I will boast; but in my own behalf I will not boast, except in regard to my weaknesses.