In the course of prayer, there sometimes occur dreams, laziness, melancholy, and coldness towards everything, lasting for a few days and even a week. It probably happened that before this we were secretly plundered by the enemy through vainglory, pride, judging others, anger, or something else. The spiritual enemy does violence to our nature so that we pass our days in idleness and laziness, rather than preparing for eternity. But if we are overcome due to our infirmity, let us not be despondent because of this, but instead let us humble ourselves and struggle with the help of God. The power of God is made perfect in infirmity.

Venerable Anatoly of Optina
Living without Hypocrisy