I Peter 1:23 Having been born again, not of corruptible seed but incorruptible, through the word of God which lives and abides forever. 
Being born again is being born of God, every attribute of God is in us through the Holy Spirit. Your redemption is the done deal, but your transformation is progressive. That you are born again does not mean all the struggles of your life are over, however, you have every ability of God to overcome them. 
What is required of you now is renewing your mind through the same incorruptible seed, God's word. Your immunity against weaknesses, sins, and iniquities is God's word. In Romans 12:2, the Bible says "And do not be conformed to this world, but be transformed by the renewing of your mind, that you may prove what is that good and acceptable and perfect will of God."
Though born of God, you have to renew your mind so that the life within can have expressions outwardly. Your spirit is one with God, Satan knows that he cannot do anything about your salvation, you have been sealed, but he will do everything possible so that you do not have to experience the fullness of it on earth unless you renew your mind.