As St. Peter was reported to have said,
"Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour:
Whom resist stedfast in the faith, knowing that the same afflictions are accomplished in your brethren that are in the world."
(I Peter 5:8-9, KJV)
Depression, resentment, so many manifestations of the evil one. Truly like a roaring lion, the enemy seems always in pursuit.
Jesus said, "Simon, Simon, behold, Satan hath desired to have you, that he may sift you as wheat: But I have prayed for thee, that thy faith fail not: and when thou art converted, strengthen thy brethren.
(St Luke 22, 31-32, KJV)
The Evil One continually plays mind games, i.e. "sifts [us] as wheat" and the more confused we are, the greater his victory.
