The Limits Placed on Evil Angels

Jude 6 -Angels are kept in darkness and bound with everlasting chains (they cannot become holy angels again)
Job 1:12, 2:6 - God limits Satan's acitivity as it pertains to believers
Matthew 16:18 - In the end, the church (God's believers) will not be overcome by Satan and his evil angels
Romans 16:20 - God is more powerful than Satan
James 4:7 - God has promised that, with His help, we are able to defeat Satan
1 Peter 5:9 - Satan cannot take away faith