I'm not a fan of spiritual bravado, but I do think there are times when believers ought to realize the frustrations occurring in their life may be satanic. Our enemy is real and he does not want the gospel to bear fruit in our lives.
We need to remind ourselves and him that we are not trapped in this world with the devil. He is trapped in this world with us.
Lord, give us tender hearts and strong backbones.
The seventy-two returned with joy and said, "Lord, even the demons submit to us in your name."
He replied, "I saw Satan fall like lightning from heaven. I have given you authority to trample on snakes and scorpions and to overcome all the power of the enemy; nothing will harm you. However, do not rejoice that the spirits submit to you, but rejoice that your names are written in heaven."
-- Luke 10:17-20