Mental Illness = varying degrees of "irresponsibility"
The biblical principle that man is answerable to his Maker for his thoughts, words, and deeds. The Bible plainly teaches that "the whole world [is] accountable to God" <Rom. 3:19>, (NASB) and that "all have sinned and fall short of the glory of God" <Rom. 3:23>. This means we cannot experience God's GRACE until we first see ourselves as sinners who are without excuse. Christians are accountable to God individually <Rom. 14:12>, and corporately as well, "for we are members of one another" <Eph. 4:25>.
All who trust Jesus Christ as their Savior are forgiven for the penalty of their sins. They also receive the strength to fight the presence of sin in their lives <Gal. 5:16-25>. Thus, our accountability is matched by God's grace and FORGIVENESS (Nelson's Illustrated Bible Dictionary).
Five Areas of Responsibility:
1. Be responsible for every thought (2 Cor. 10:5)
2. Be responsible for every word (Matthew 12:36)
3. Be responsible for every deed (2 Cor. 5:10)
4. Be responsible for every attitude (1 Peter 3:10)
5. Be responsible for every motive (Jer. 17:10)
It is most vital for people to deal with the root of their problems; sin. The treatment prescribed is repentance and faith.
God does not speak about mental illness or emotional stability as such but obedience, responsibility including accountability in keeping His commands. Mental Illness does exist to the extent of man having serious emotional, psychological and physical problems however, the problem(s) may be in a sense irrelevant as opposed to how the actual problem(s) are treated. In diagnosing the problem(s), it is critical that a thorough assessment including all symptoms be carefully examined.
"Counselors of all persuasions attempt to get at the root of the human condition. According to the Bible, the root diagnosis ( what is radically wrong with man) is sin".