Dwelling is a very slippery slope. A lie dwelt on will become a thought.
The thoughts are usually then spoken out of the mouth in the form of complaints.
Our words have the power of life and death, we now give that what is spoken, power and life.
“We demolish arguments and every pretention that sets itself up against the knowledge of God, and take captive every thought and make it obedient to Christ.” 2 Corinthians 10:5b