Psalm 1:1-3:

Blessed is the man that walketh not in the counsel of the ungodly, nor standeth in the way of sinners, nor sitteth in the seat of the scornful.
But his delight is in the law of the LORD; and in his law doth he meditate day and night.
And he shall be like a tree planted by the rivers of water, that bringeth forth his fruit in his season; his leaf also shall not wither; and whatsoever he doeth shall prosper.

See also:

The Confession UNTO Faith and the Confession OF Faith
Crossing the Bridge from Head Knowledge to Revelation Knowledge
Preparing to Minister Healing
Healing and Effort
Is “Seeing Yourself Healed” a New Age Visualization Technique?
Should I Use Meditation to Be Healthier?