en_tn_condensed/2pe/02/15.md

the straight way

Behavior that honors God is spoken of as if it were a path to follow.

have gone astray

People who commit evil behavior that displeases God are spoken of as if they were animals like cows or sheep who go away from the people who take care of them.

to receive payment for unrighteousness

"to receive money for doing things that are not righteous"