en_tn/rom/07/21.md

this law: When I want to do good, evil is present with me

The words "this law" refer to the natural human desire to rebel against God and disobey him. Paul calls this a law because he has observed that this is the way people live. It is not a collection of written commands.

evil is present with me

Paul speaks of evil here as if it were alive and living with him. (See: rc://en/ta/man/translate/figs-personification)