Let us be filled with confidence and let us discard everything so as to be able to meet this onslaught. Christ has equipped us with weapons more splendid than gold, more resistant than steel, weapons more fiery than any flame and lighter than the slightest breeze[...]. These are weapons of a totally new kind for they have been forged for a previously unheard-of type of combat. I, who am a mere man, find myself called upon to deal blows to demons; I, who am clothed in flesh find myself at war with in corporeal powers. God has designed for me also an armour made, not of metal, but of justice; he has designed for me a shield not of bronze but of faith. I hold in my hand a keen sword, the word of the Spirit [...].Your victory must be that of a man who rests content.
St. John Chrysostom
Baptismal Catechesis, 3, 11-12