overcome depression by repenting to God and religion. there must be someone who always guides him for the right path.
We all know that depression is mental illness that needs an immidiate action, because sometimes it might lead to suicide/death. And to stay away from it, just have someone trusted to talk to, voice out all your problems that depresses you, and most of all, prayer to our God is the best way to overcome all your depression, ask for His guidance.