 Many Christians ignore this open door. Though demons can't re-enter born-again spirit-filled believers as they can with unbelievers, this doesn't mean we can compromise without consequence. An open door is a point of spiritual vulnerability or anything that makes you more likely to fall for deception. This is key because deception is the root of all spiritual attack, but there is an open door very few consider, states of being. An example of a state of being is anger. Be angry and sin not, and either give place to the devil. The word place here isn't describing a literal physical space, but rather an opportunity. In other words, in a state of anger, one is more likely to think and behave in an ungodly way. Other states of being include exhaustion, hunger, confusion, sorrow, and so forth. Though these aren't necessarily sinful unto themselves, being in these states makes one more vulnerable to compromise. Be vigilant. For more on spiritual warfare, get Holy Spirit the Bondage Breaker at bondagebreaker.com