2:5 And spared not the old world, but saved Noah the eighth person, a preacher of righteousness, bringing in the flood upon the world of the ungodly;
2:12 But these, as natural brute beasts, made to be taken and destroyed, speak evil of the things that they understand not; and shall utterly perish in their own corruption;
kosmos = mankind. (See Scofield "Matthew 4:8") .
2:14 Having eyes full of adultery, and that cannot cease from sin; beguiling unstable souls: an heart they have exercised with covetous practices; cursed children:
natural brute beasts
natural animals without reason. Jude 1:10 .
2:15 Which have forsaken the right way, and are gone astray, following the way of Balaam the son of Bosor, who loved the wages of unrighteousness;
Sin. (See Scofield "Romans 3:23") .
2:20 For if after they have escaped the pollutions of the world through the knowledge of the Lord and Saviour Jesus Christ, they are again entangled therein, and overcome, the latter end is worse with them than the beginning.
Balaam. (See Scofield "Numbers 22:5") was the typical hireling prophet, anxious only to make a market of his gift. This is the "way" of Balaam. See the "error" of Balaam, See Scofield " Jude 1:11 " and the "doctrine" of Balaam, See Scofield " Revelation 2:14 ".
world kosmos = world-system.
Saviour (See Scofield "Romans 1:16")