The Lord sent an evil spirit to Saul to test him, and he failed the test. Jesus was “led up of the Spirit…to be tempted of the devil” (Matthew:4:1). There are tests and trials in our lives that are designed for “the trial of your faith, being much more precious than of gold that perisheth, though it be tried with fire, [that it] might be found unto praise and honour and glory at the appearing of Jesus Christ…” (1 Peter:1:7). Greet each bout of “depression” with joy: another opportunity for your faith to grow, for you to triumph in Christ!
"Rejoice in the Lord alway: and again I say, Rejoice."