Emotion energy - Emotion is mental energy. If it is not expressed it will flow into the body. Painful emotions - fear, anger - residing in the body can cause a neurosis.

Chemical energy - Eating food that lacks essential vitamins can cause depression as well as schizophrenia. Pharmaceutical drugs have chemical side-effects.

Spiritual energy - Spiritual experiences occur at the level of spiritual energy - such as a kundalini awakening. From spiritual ignorance they will be viewed as mental problems.