The Pilgrim: Romans 14:23

By this, therefore, you see the miserable state of the people that have not faith ‘Whatever they do, they sin’; if they break the law, they sin; if they endeavour to keep it, they sin; they sin, I say, upon a double account, first, because they do it but imperfectly; and, secondly, because they yet stay upon that, resisting that which is perfect, even that which God hath appointed. It mattereth not, as to justification from the curse, therefore, men wanting faith, whether they be civil or profane, they are such as stand accursed of the law, because they have not believed, and because they have given the lie to the truth, and to the God of truth. Let all men, therefore, that would please God make conscience of believing; on pain, I say, of displeasing him; on pain of being with Cain rejected, and on pain of being damned in hell. ‘He that believeth not shall be damned,’ Mark 16:16. Faith is the very quintessence of all gospel obedience, it being that which must go before other duties, and that which also must accompany whatever I do in the worship of God, if it be accepted of him. —John Bunyan, Justification by an Imputed Righteousness