When the soul loses its fervor…

When the soul betrays itself and loses the blessed and longed-for fervor, let it carefully investigate the reason for losing it. And let it arm itself with all its longing and zeal against whatever caused this. For the former fervor can return only through the same door through which it was lost.
–Saint John Climacus (c. 525-606)

Distractions and desires…

The dark powers are sick with envy against us when we pray, and they will use every conceivable trick to frustrate us spiritually. They endlessly stir up our inner memories to distract us into thoughts and will try to stir our flesh to all kinds of desires, for in this way they think they can hinder the soul’s glorious ascent and its journey to God.
–Evagrius Ponticus (345-399)

Distractions and aridity…

Do not be surprised at your distractions and spiritual aridity. This derives partly from the senses and partly from your heart, which is not entirely under your control. But your courage, which God granted you, is irremovable and constantly determined. Therefore live tranquilly. You must not be anxious, however long this evil lasts.
–Saint Pio (1887-1968)