"A work of grace in the soul makes itself known either to the one who has it or to onlookers. "Where - John Bunyan

Christian meets two more ill-fated pilgrims as he continues his expedition down the King's Highway. His ability to discern a false pilgrim has been advanced since his experience with Simple, Sloth, and Presumption.
Christian immediately focuses on three things that seem out of place. First, the tumbling over the wall called Salvation without coming through Christ, the narrow gate, or experiencing any illumination by the Holy Spirit immediately warns Christian that these are trespassers. Second, their testimony of having come from the land of Vain-Glory warns Christian that they are neither humble nor burdened by sin. Third, their wish to arrive at Mt. Zion to receive praise rather than to give praise to the only one worthy of praise alarms Christian. Christian quickly discerns that the motives of Formalist and Hypocrisy are unworthy and contemptuous.
Formalist

Oh! the un-thought-of imaginations, frights, fears, and terrors, that are affected by a thorough application of guilt yielding to desperation! This is the man that hath his dwelling among the tombs with the dead; that is always crying out, and cutting himself with stones. Mark v. 1, 2, 3. But, I say, all in vain; desperation will not comfort him, the old covenant will not save him: nay, heaven and earth shall pass away, before one jot or tittle of the word and law of grace will fail or be removed.

O my Mansoul, I have lived, I have died, I live, and I will die no more for thee. I live that thou mayest not die. Because I live thou shalt live also; I reconciled thee to my Father by the blood of My cross, and being reconciled thou shalt live through me. I will pray for thee, I will fight for thee, I will yet do thee good.
Nothing can hurt thee but sin; nothing can grieve Me but sin; nothing can make thee base before thy foes but sin; take heed of sin, my Mansoul.