Some lusts are far more sensible and discernible in their violent actings than others. Paul puts a difference between uncleanness and all other sins- 1 Corinthians 6-18, -Flee fornication. Every sin that a man doeth is without the body- but he that committeth fornication sinneth against his own body. -Hence, the motions of that sin are more sensible, more discernible than of others- when perhaps the love of the world, or the like, is in a person no less habitually predominant than that, yet it makes not so great a combustion in the whole man.