Paul tells us to neither give place to the devil-after exhorting us not to sin when we get angry. When you "give place to the devil" what does that mean? You grant or offer because you have the power to receive or not receive, you allow and yield a place, in your mind, your time, your life, to the devil, to work against your faith, by lying to your mind or planting seeds that will contradict the word of God.  You give him place when you don't shut him down and slam the door in his face every time he whispers condemnation and guilt to you. Every time he tries to inject doubt and fear in your mind, and you don't remember the promises of God, but instead consider the lie of the enemy being dumped in your mind, you give him place. You must be always aware his number one desire first and foremost is to steal your confidence and faith in the promises of God. If he succeeds in stealing your faith, next he can reduce you to a cowering, fearful unbeliever. If he does that, what's left for him to do but kill and destroy? By giving him place, you grant him license to hinder your walk and life with Christ. The devil is a false accuser, he's a slanderer. He deceives, manipulates, and lies to people. He knows how to stir up their flesh and provoke them to wrath, or wickedness. He does it through the mind. Through the lust of the eyes, the pride of life, and world. He works in unbelievers who are not saved. He moves them against believers, at times, by deceiving them into thinking a lie, and manipulates them into saying or doing something to injure or discourage the believer, mentally.

Now, consider verse 30 very careful. And grieve not the Holy Spirit of God whereby ye are sealed unto the day of redemption. Can you grieve someone who does not care about you? I wouldn't think so. The word "grieve" means to distress, cause grief, be in heaviness, be sorrowful, to make sorry. To cause pain of mind, afflict or wound the feelings. To offend, displease, provoke, cause regret in another. To be in pain on account of an evil, to sorrow or mourn. Now what can we do that would cause the Holy Spirit to feel this way-and remember if He dwells in you, he knows you intimately. He knows every thought, feeling, everything.
If you don't believe God, if you don't trust God, in his love and grace and mercy, but yet listen to the enemy-and let his lies hinder you-surely that would grieve the Holy Spirit. Father, please forgive me. I'm guilty. If you behave in a manner that causes reproach on the Lord, that would grieve him. He understands we are overcome at times by things. But if we are habitual-that is another matter. Are we habitually falling into fear and unbelief? Insecurity with the God who tells us so lovingly in his word how much we mean to him? What a high price he willingly and gladly paid? The Scripture says "it pleased him to bruise him" in Isaiah 53. God help us to be loosed from this bondage, and confident in who we are...trusting what he says even more than what we see! Be mindful of the Scriptures not the adversary's toxic lies. His grace is sufficient. His word is our consolation.