Ephesians 2 (Entire chapter)
:20 Chief Cornerstone
*** Tree with roots and fruit analogy:
Matthew 13:1-23 Parable of the sower. We must have good root.
Galatians 5:22-23 Fruits of The Spirit. These are the evidence that we are saved (not speaking in tongues).
Joy and peace is among these fruits that are produced in people that have The Holy Ghost dwelling inside.
The Holy Ghost gives peace and joy and strength also.
It's impossible that a truly saved person would eventually need to enter a mental hospital, except only because of persecution, such as people thinking that we are insane for speaking the truth.
The level of despair, depression and mental illness that needs mental hospital treatment is a level of despair that can not be found in the same soul or same body as what The Holy Ghost dwells in! Because The Holy Ghost does NOT dwell inside of insanity, nor inside of darkness or anything contrary to the Light of Jesus Christ.
John 14 (Entire chapter) He gives to us Peace, Joy, Comfort and Hope.
John 15:1-11 MUST bear fruit.
:2 Ultimately, Christ is all we need. We shall not want/need any other/additional.