Brooks goes on to describe the tactics Satan uses to undermine our conviction that we are a child of God.
The only way to dispossess [the heart] of an old affection is by the expulsive power of a new one. Thomas Chalmers, The Expulsive Power of a New Affection
Some more Brooks on the tactics Satan uses to derail our duties and how to resist them
Read Thomas Brooks on the tactics Satan uses to entice us to sin and how to resist them