Jamieson, Fausset & Brown, on 2Pet 2:12

“But these men, as irrational beasts, naturally tending to the snare and to destruction, blaspheming those things which they know not, shall perish in their corruption,”

“(Jde 1:19). But--In contrast to the "angels," Pe2 2:11. brute--Greek, "irrational." In contrast to angels that "excel in strength." beasts--Greek, "animals" (compare Psa 49:20). natural--transposed in the oldest manuscripts, "born natural," that is, born naturally so: being in their very nature (that is, naturally) as such (irrational animals), born to be taken and destroyed (Greek, "unto capture and destruction," or corruption, see on Gal 6:8; compare end of this verse, "shall perish," literally, "shall be corrupted," in their own corruption. Jde 1:10, naturally . . . corrupt themselves," and so destroy themselves; for one and the same Greek word expresses corruption, the seed, and destruction, the developed fruit). speak evil of--Greek, "in the case of things which they understand not." Compare the same presumption, the parent of subsequent Gnostic error, producing an opposite, though kindred, error, the worshipping of good angels": Col 2:18, "intruding into those things which he hath not seen."”

Imported from an open dataset — not yet checked against the printed edition.