John 4:30

I will not speak with you much longer, for the ruler of the world (Satan) is coming. And he has no claim on Me (no power over Me nor anything that he can use against Me).

Keep the door closed to the enemy. Anger, strife, unforgiveness, sadness, lack of knowledge of the word- all keep the doors open to the enemy and us open to attack. We have authority through Jesus as born-again believers. We speak our faith and act in accordance with it.