Damien Thorn: Most people confuse evil with their own trivial lusts and perversions. Now, true evil is as pure as innocence.
Damien Thorn: Oh my Father, Lord of Silence, Supreme God of Desolation, though mankind reviles yet aches to embrace, strengthen my purpose to save the world from a second ordeal of Jesus Christ and his grubby mundane creed. Show man instead the raptures of Thy kingdom. Infuse in him the grandeur of melancholy, the divinity of loneliness, the purity of evil, the paradise of pain.
Damien Thorn: I now command you to seek out and destroy the Nazarene child. Slay the Nazarene... and I shall reign forever. Fail... and I perish.
Peter: I love you.
Damien Thorn: Beyond all others.
Peter: Beyond all others.
Damien Thorn: Beyond life itself.
Damien Thorn: If Abraham was ready to slay his own son for the love of his God, why won't you do the same for the love of mine?
Damien Thorn: You, my disciples will truly inherit this Earth.
Damien Thorn: Nazarene, you have won... nothing.
Answer: Damien states at one point that as the birth of the Nazarene gets closer, his strength fades accordingly. Presumably this also applies to any forces assisting him.