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This book, which covers Visions and hallucinations, explains what causes them and summarises how many hallucinations have been caused by each event or activity. It also provides specific help with questions people have asked us, such as ‘Is my medication giving me hallucinations?’.

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Observations placeholder

Suhrawardi - Hikmat al-ishriq - The Music of the Spheres



Type of Spiritual Experience


A description of the experience

Shihabuddin Yahya Suhrawardi – Hikmat al-ishriq [translated by Henry Corbin and Nancy Pearson]

The celestial sphere give out sounds which are not caused by anything existing in our sublunar world…. The most that can be said on this point is that here below sound is conditioned by the undulation of the air. But if a thing is the condition of another in a certain place, it does not follow that it remains a condition for its analogue.

Just as anything in general can have multiple interchangeable causes, so also its conditions can change. Just as the colours of the stars are not conditioned by that which conditions the colours in our terrestrial world, so it is as regards the sounds emitted by the celestial spheres.

We cannot say that the tremendous terrifying sounds heard by the visionary mystics are caused by an undulation of air in the brain.

For an air wave of such force due to some disturbance in the brain is inconceivable.

No, what we have here is the archetypal image of the sound, and this autonomous form is itself a sound. Thus it is conceivable that there are sounds and melodies in the celestial spheres which are not conditioned by the air nor by a vibratory disturbance. And one cannot imagine that there could be melodies more delightful than theirs, …

The source of the experience


Concepts, symbols and science items

Science Items

Activities and commonsteps



Inherited genes