Adam Clarke's Commentary on the Bible - 2 Peter 2:13
They that count it pleasure to riot in the day time - Most sinners, in order to practice their abominable pleasures, seek the secrecy of the night; but these, bidding defiance to all decorum, decency, and shame, take the open day, and thus proclaim their impurities to the sun. Spots - and blemishes - They are a disgrace to the Christian name. Sporting themselves - Forming opinions which give license to sin, and then acting on those opinions; and thus rioting in their own deceits. ... read more
Adam Clarke's Commentary on the Bible - 2 Peter 2:12
But these, as natural brute beasts - ' Ὡς αλογα ζωα φυσικα· As those natural animals void of reason, following only the gross instinct of nature, being governed neither by reason nor religion. Made to be taken and destroyed - Intended to be taken with nets and gins, and then destroyed, because of their fierce and destructive nature; so these false teachers and insurgents must be treated; first incarcerated, and then brought to judgment, that they may have the reward of their doings.... read more