1 Thessalonians 2:5

For neither at any time used we flattering words,.... To introduce them into the affections, and gain the esteem and good will of men; they did not in their ministry deliver such things as flattered men with a good opinion of themselves: they did not preach up the purity of human nature, but on the contrary the doctrine of original sin, the imputation of Adam's transgression to his posterity, and the corruption of all human nature; they asserted the universal pollution of it, of all men, and of all the powers and faculties of their souls, that they are all under the power and dominion of sin, are involved in the guilt of it, and are all guilty before God, and liable to everlasting wrath and punishment; and that unless they repented of their sins and believed in Christ, they would perish eternally; thus they dealt roundly and freely with men's consciences, and plainly, openly, and faithfully told them their case as it was: nor did they cry up the power of man's free will, which would have been grateful to Jews and Gentiles; but they declared the reverse, they asserted the weakness and impotency of man, to anything that is spiritually good; and represented him as a weak and strengthless creature, and unable to do anything, even to think a good thought of himself; and ascribed all that a man is, or has, or does, that is good, to the grace and power of God, who works in him both to will and to do: nor did they plead for the sufficiency of man's righteousness to justify him before God, a doctrine very pleasing to human nature; but, on the contrary, they gave out that there was none righteous, no, not one of the sons of Adam, in and of themselves, or by virtue of any righteousness of their own; so far from it that they were full of all unrighteousness, and were not capable of working out a righteousness, or of attaining to the righteousness of the law; that what they did pretend to was not a justifying righteousness, and would give no right and title to eternal glory; and that the righteousness of Christ was the only righteousness, by which a man could be justified from all things, and in which he could be found safe.