Romans 6:16 says, ““Know ye not, that to whom ye yield yourselves to obey, his servants ye are whom ye obey; whether of sin unto death, or of obedience unto righteousness?”
In this spiritual battle, your actions are very important. Most people recognize that actions are important in the physical realm. You know that there are consequences for what you do. If you’re speeding while driving, you could get a ticket or cause a wreck. The ticket could cost money and put points on your license. The wreck could damage cars or even cost someone their life. When we talk negatively about someone, we can hurt their feelings or even loose demonic powers against them.
There’s much more to life than just this physical, natural, surface level. Spiritual dynamics are constantly taking place. Whether or not the person you’re speaking evil about ever knows it, you’ll be affected. Venting anger, frustration, resentment, or unforgiveness affects you whether it affects anyone else or not. If you get angry and bitter, you’ve just yielded yourself to Satan. Whether you recognize it or not, the devil is the one who influences us to respond in the wrong way.
James 1:20 says, “The wrath of man worketh not the righteousness of God.” In other words, giving place to anger and bitterness doesn’t accomplish the righteousness of God. You aren’t going to accomplish God’s purposes by getting in the flesh, giving in to anger, and losing your temper. That’s not the way God’s kingdom works. So whether anyone else ever hears you or not—what you say is having an effect on you.
James 3:16 says, “Where envying and strife is, there is confusion and every evil work.” Notice how this doesn’t say, “some” evil works. It doesn’t say envying and strife “could” allow the devil to come against “certain types of people.” No, when you get into envy and strife, you’re flinging the door wide open and saying, “Come on in Satan and do your worst in my life.” You’re drawing a great big target on your back and saying, “Shoot your best shot!” When you give in to envy and strife, you make yourself a target for the devil.