Knowing that he that is such is subverted, and sinneth, being condemned of himself.

People's New Testament

Titus 3:11 Knowing that he that is such. No one can continue factious unless he is perverted from the truth.

Wesley's Notes

3:11 Such an one is perverted - In his heart, at least. And sinneth, being self - condemned - Being convinced in his own conscience that he acts wrong.

Scofield Reference Notes

Margin sinneth

Sin. See Scofield Note: "Rom 3:23".

Jamieson-Fausset-Brown Bible Commentary

11. is . subverted-"is become perverse."

condemned of himself-He cannot say, no one told him better: continuing the same after frequent admonition, he is self-condemned. "He sinneth" wilfully against knowledge.

Matthew Henry's Concise Commentary

3:8-11 When the grace of God towards mankind has been declared, the necessity of good works is pressed. Those who believe in God, must make it their care to maintain good works, to seek opportunities for doing them, being influenced by love and gratitude. Trifling, foolish questions must be avoided, and subtle distinctions and vain inquiries; nor should people be eager after novelties, but love sound doctrine which tends most to edifying. Though we may now think some sins light and little, if the Lord awaken the conscience, we shall feel even the smallest sin heavy upon our souls.