Look on sin with that eye [with] which within a few hours we shall see it.
Ah, souls! when you shall lie upon a dying bed, and stand before a judgment-seat, sin shall be unmasked, and its dress and robes shall then be taken off, and then it shall appear more vile, filthy, and terrible than hell itself; then, that which formerly appeared most sweet will appear most bitter, and that which appeared most beautiful will appear most ugly, and that which appeared most delightful will then appear most dreadful to the soul.
Ah, the shame, the pain, the gall, the bitterness, the horror, the hell that the sight of sin, when its dress is taken off, will raise in poor souls! Sin will surely prove evil and bitter to the soul when its robes are taken off. A man may have the stone who feels no fit of it. Conscience will work at last, though for the present one may feel no fit of accusation. Laban shewed himself at parting. Sin will be bitterness in the latter end, when it shall appear to the soul in its own filthy nature. The devil deals with men as the panther doth with beasts; he hides his deformed head till his sweet scent hath drawn them into his danger. Till we have sinned, Satan is a parasite; when we have sinned, he is a tyrant.
O souls! the day is at hand when the devil will pull off the paint and garnish that he hath put upon sin, and present that monster, sin, in such a monstrous shape to your souls, that will cause your thoughts to be troubled, your countenance to be changed, the joints of your loins to be loosed, and your knees to be dashed one against another, and your hearts to be so terrified, that you will be ready, with Ahithophel and Judas, to strangle and hang your bodies on earth, and your souls in hell, if the Lord hath not more mercy on you than he had on them.
Oh! therefore, look upon sin now as you must look upon it to all eternity, and as God, conscience, and Satan will present it to you another day!
The Complete Works of Thomas Brooks, 1:17.