In Yajurveda, the Manas has been conceptualized as the inner flame of knowledge. It is a tool to perceive knowledge. All the sensory organs are under control of mind.
In Rigveda, references about speed of mind, methods of mental happiness, special invocation for mental happiness and methods of increasing Medha (intelligence) have been described. Purity of mind is given special emphasis with a statement that it can prevent diseases in human beings. The healing power of mind has also been described. Sattva, Rajas and Tamas- the three characteristics of mind are narrated. The mental disorders are given equal importance with physical illness. It has been prayed to prevent destruction of body by mental factors.