Thomas Brooks emphasizes the distinction between common grace and renewing grace in relation to sin. He explains that common grace leads individuals to fear the consequences of sin, such as hell and judgment, rather than recognizing the inherent evil and offense of sin against God. A sanctified heart detests sin for its defiling nature and its offense to God's holiness, while an unsanctified heart is primarily concerned with the personal repercussions of sin. Brooks illustrates that true hatred of sin arises from a love for God and His righteousness, rather than fear of punishment.