It must be repeated here that according to Buddhist philosophy there is no permanent, unchanging spirit which can be considered ‘Self’, or ‘Soul’, or ‘Ego’, as opposed to matter, and that consciousness (viññaṇa) should not be taken as ‘spirit’ in opposition to matter. This point has to be particularly emphasized, because a wrong notion that consciousness is a sort of Self or Soul that continues as a permanent substance through life, has persisted from the earliest time to the present day.

One of the Buddha’s own disciples, Sāti by name, held that the Master taught: ‘It is the same consciousness that transmigrates and wanders about.’ The Buddha asked him what he meant by ‘consciousness’. Sāti’s reply is classical: ‘It is that which expresses, which feels, which experiences the results of good and bad deeds here and there.’

‘To whomever, you stupid one,’ remonstrated the Master, ‘have you heard me expounding the doctrine in this manner? Haven’t I in many ways explained consciousness as arising out of conditions: that there is no arising of consciousness without conditions.’ Then the Buddha went on to explain consciousness in detail:

‘Consciousness is named according to whatever condition through which it arises: on account of the eye and visible forms arises a consciousness, and it is called visual consciousness; on account of the ear and sounds arises a consciousness, and it is called auditory consciousness; on account of the nose and odors arises a consciousness, and it is called olfactory consciousness; on account of the tongue and tastes arises a consciousness, and it is called gustatory consciousness; on account of the body and tangible objects arises a consciousness, and it is called tactile consciousness; on account of the mind and mind-objects (ideas and thoughts) arises a consciousness, and it is called mental consciousness.’

Then the Buddha explained it further by an illustration: A fire is named according to the material on account of which it burns. A fire may burn on account of wood, and it is called wood fire. It may burn on account of straw, and then it is called straw fire. So consciousness is named according to the condition through which it arises. …

The Buddha declared in unequivocal terms that consciousness depends on matter, sensation, perception and mental formations, and that it cannot exist independently of them. He says:

‘Consciousness may exist having matter as its means (rūpupāyaṃ), matter as its object (rūpārammaṇaṃ), matter as its support (rūpapatiṭṭhaṃ) and seeking delight it may grow, increase and develop ; or consciousness may exist having sensation as its means . . . or perception as its means . . . or mental formations as its means, mental formations as its object, mental formations as its support, and seeking delight it may grow, increase and develop.

‘Were a man to say: I shall show the coming, the going, the passing away, the arising, the growth, the increase or the development of consciousness apart from matter, sensation, perception and mental formations, he would be speaking of something that does not exist.’