{11} Unto the pure all things are pure: but unto them that are defiled and unbelieving is nothing pure; but even their {o} mind and conscience is defiled.

(11) He shows in few words, that purity consists not in any external worship, and that which is according to the old Law (as indifference of meats, and washings, and other such things which are abolished) but in the mind and conscience. And whoever teaches otherwise, does not know what true religion really is, and also is not to be heeded.

(o) If our minds and consciences are unclean, what cleanness is there in us before regeneration?

People's New Testament

Titus 1:15 Unto the pure all things are pure. In the Jewish fables just referred to (Titus 1:14) were rigid regulations concerning foods and purifications. Hence Paul adds, It is not food that makes one impure. To the pure all things are pure. When one is unbelieving and defiled, no food can make him pure. See notes on Ro 14:14 1Co 8:4-8.

Wesley's Notes

1:15 To the pure - Those whose hearts are purified by faith this we allow. All things are pure - All kinds of meat; the Mosaic distinction between clean and unclean meats being now taken away. But to the defiled and unbelieving nothing is pure - The apostle joins defiled and unbelieving, to intimate that nothing can be clean without a true faith: for both the understanding and conscience, those leading powers of the soul, are polluted; consequently, so is the man and all he does.

Jamieson-Fausset-Brown Bible Commentary

15. all things-external, "are pure" in themselves; the distinction of pure and impure is not in the things, but in the disposition of him who uses them; in opposition to "the commandments of men" (Tit 1:14), which forbade certain things as if impure intrinsically. "To the pure" inwardly, that is, those purified in heart by faith (Ac 15:9; Ro 14:20; 1Ti 4:3), all outward things are pure; all are open to, their use. Sin alone touches and defiles the soul (Mt 23:26; Lu 11:41).

nothing pure-either within or without (Ro 14:23).

mind-their mental sense and intelligence.

conscience-their moral consciousness of the conformity or discrepancy between their motives and acts on the one hand, and God's law on the other. A conscience and a mind defiled are represented as the source of the errors opposed in the Pastoral Epistles (1Ti 1:19; 3:9; 6:5).

Matthew Henry's Concise Commentary

1:10-16 False teachers are described. Faithful ministers must oppose such in good time, that their folly being made manifest, they may go no further They had a base end in what they did; serving a worldly interest under pretence of religion: for the love of money is the root of all evil. Such should be resisted, and put to shame, by sound doctrine from the Scriptures. Shameful actions, the reproach of heathens, should be far from Christians; falsehood and lying, envious craft and cruelty, brutal and sensual practices, and idleness and sloth, are sins condemned even by the light of nature. But Christian meekness is as far from cowardly passing over sin and error, as from anger and impatience. And though there may be national differences of character, yet the heart of man in every age and place is deceitful and desperately wicked. But the sharpest reproofs must aim at the good of the reproved; and soundness in the faith is most desirable and necessary. To those who are defiled and unbelieving, nothing is pure; they abuse, and turn things lawful and good into sin. Many profess to know God, yet in their lives deny and reject him. See the miserable state of hypocrites, such as have a form of godliness, but are without the power; yet let us not be so ready to fix this charge on others, as careful that it does not apply to ourselves.