Justification by an Imputed Righteousness

Though not as well known as Pilgrim's Progress, Justification by an Imputed Righteousness is an important treatise Bunyan wrote about how Christians can save themselves:

"No Way to Heaven but by JESUS CHRIST. I. By justification with God, we stand clear, quit, free, or in a saved condition, in the approbation of His holy law. II. By justification with men, we stand clear and quit from just ground of reprehension with them. All by the imputation of the righteousness of Jesus Christ, in which we have faith working by love."