Attack its root. Reading the Bible does not do it alone. What is the true root of your depression? Have you confessed all sins? Are you a true believer on the Lord JESUS Christ? If yes, do you read your Bible daily for edification and guidance? If yes, do you obey what the Bible says? Do you pray? Are your desires for life matching His desires for your life (a very key point)?
Our people suffer because of the lack of knowledge, the word depression is NEVER mentioned in the bible. The signs of it are there as displayed in our Bro. Job, because of his OPPRESSIONS.
If spiritually you are troubled in your mind; worried; or weighed down by a feeling of fear, and you don't KNOW WHY, you must recieve from the word and everyday speak to yourself that
2 Tim 1:7For God hath not given us the spirit of fear; but of power, and of love, and of a sound mind
If you do KNOW WHY, you must address the situation for it is the root of your oppression, and has to be confronted. IT IS A SIN TO WORRY, for it is a form of fear and fear is of the devil.
In the natural, you may have some imbalances, if led go to doctor, but be very careful of their prescribing, they always use anti-depressant, it is better to find a natural sources to boost your serotonin level, Noni Juice taste bad, you can also use herbs like Ginseng, Griffonia Simplicifolia.....