Yes, it takes hard work if we want to stay alive. Even it is work for me to breath sometimes. I see an old guy out walking his dog every day and that is what keeps him and his dog alive. I have a therapist come into the house one day a week to encourage me to go beyond what I am doing.
I believe what the law of attraction people say that depression is the result of negative energy and we need positive energy. The Karma people say the same thing. Some people like Oprah think to be a Christian is positive energy overcoming the negative. The Bible clearly says that in everything we are to give thanks because God causes all things to work together for good for those who love God and are called according to His purpose. He gives us the desires of our heart so of course we need to purify out heart so we only desire what is good and beneficial for us.
Elijah7777, please let me share with you my experience with seven years of major depression. It began with fatigue, then continued with exhaustion, and finally became an emotional separation from the people around me. I finally sought God's help by psychological means at a Christian Mental Hospital (Pine Rest in Grand Rapids, MI). God used those folks to get me in touch with my unconscious anger and anxiety that were at the root of my depression.
As those feelings about the losses in my life surfaced, for the first time in decades, I began to express my true feelings. Then, I began to unload them on God in prayers of lament, the way Job, David, and Jeremiah did. It took 8 1/2 months three or four times a week for me honestly to share such prayers with God with tears.
Then, God gave me his peace of Philippians 4:6-7, which has persisted in my life for more than 3 decades; my depression never returned, as long as I lamented when the tiredness returned.
Read Psalms 6, 22, 39, 88; Job 10; Lamentations 3; and Habakkuk as examples of laments. The amazing thing is that God came a lot closer to me, even while I was angry with him for allowing, not causing, the losses in my life.