With regard to mental health specifically, the Bible doesn't contain a word for mental illness. Don't be wise in your own eyes; fear the Lord and stay away from evil. It will heal your flesh and refresh your bones. The conversation about mental illness and its validity has sometimes been controversial, especially among those in the faith.
It's important to note that the Bible never explicitly talks about mental illness in terms of how we would define it in modern times. Even so, more and more churches are experiencing the effects of mental illness within their congregations. Treatment and care have been topics that many have debated, and while these questions are not easy to answer, the Bible gives us an idea of how we should view and respond to those who are struggling with their own minds. Mental health and mental illness are not just a mental problem, but they represent the effects of interruption in the relationship designed to operate throughout Shalom.
All quotes from the Scriptures, unless otherwise indicated, are taken from The Holy Bible, the standard version in English. Scott, PhD, NCC, LPC-S is an associate professor of clinical mental health counseling at Columbia International University in Columbia, South Carolina, and provides clinical counseling and community oversight through his counseling office, Sunrise Counseling. Many people use the terms “mental health” and “mental illness” interchangeably, assuming that, while mental illness is the presence of psychopathologies, such as depression and anxiety, mental health then becomes the absence of these disorders or diseases. Although I don't think it's useful to apply modern diagnoses to ancient biblical characters, since their context, experience and perspective are very different and partly unknown, the Scriptures abound with examples of people showing symptoms of the absence of Shalom in their functioning.
Focusing on mental health is focusing on following God's redemptive plan for us and the world, seeking to proclaim the kingdom of God and the integrity and healing that are provided through Christ.