I have power and authority. Satan has just power. Because of ignorance we give our authority to the enemy.
We need to know who Jesus is (the faith we have that makes us believe in Jesus).
“Behold! I have given you authority and power to trample upon serpents and scorpions, and [physical and mental strength and ability] over all the power that the enemy [possesses]; and nothing shall in any way harm you.” – Luke 10:19 AMP
“I have told you these things, so that in Me you may have [perfect] peace and confidence. In the world you have tribulation and trials and distress and frustration; but be of good cheer [take courage; be confident, certain, undaunted]! For I have overcome the world. [I have deprived it of power to harm you and have conquered it for you.]” – John 16:33 AMP
“[But] he who commits sin [who practices evildoing] is of the devil [takes his character from the evil one], for the devil has sinned (violated the divine law) from the beginning. The reason the Son of God was made manifest (visible) was to undo (destroy, loosen, and dissolve) the works the devil [has done].” – 1 John 3:8 AMP
“He said to them, But who do you [yourselves] say that I am? Simon Peter replied, You are the Christ, the Son of the living God. Then Jesus answered him, Blessed (happy, fortunate, and to be envied) are you, Simon Bar-Jonah. For flesh and blood [men] have not revealed this to you, but My Father Who is in heaven. And I tell you, you are Peter [Greek, Petros –a large piece of rock], and on this rock [Greek, petra –a huge rock like Gibraltar] I will build My church, and the gates of Hades (the powers of the infernal region) shall not overpower it [or be strong to its detriment or hold out against it]. I will give you the keys of the kingdom of heaven; and whatever you bind (declare to be improper and unlawful) on earth must be what is already bound in heaven; and whatever you loose (declare lawful) on earth must be what is already loosed in heaven. [Isa. 22:22.]” – Matthew 16:15-19 AMP