"The freshness of a living hope in God fills the soul with such energy and resolution, with such aspirations after the things of eternal life, that all this world seems to it—as indeed it is—in comparison with that which it hopes for, dry, withered, dead, and worthless. The soul now denudes itself of the garments and trappings of the world, by setting the heart upon nothing that is in it, and hoping for nothing that is, or may be, in it, living only in the hope of everlasting life. And, therefore, when the heart is thus lifted up above the world, the world cannot touch it or lay hold of it, nor even see it. The soul then, thus disguised and clad in the vesture of hope, is secure from its second foe, the world, for St. Paul calls hope the helmet of salvation. Now a helmet is armor which protects and covers the whole head, and has no opening except in one place, where the eyes may look through. Hope is such a helmet, for it covers all the senses of the head of the soul in such a way that they cannot be lost in worldly things, and leaves no part of them exposed to the arrows of the world."
— St. John of the Cross, Dark Night of the Soul p.175