Who am I?

The physical body, composed of the seven dhatus, is not ‘I’. The five sense organs… and the five types of perception known through the senses… are not ‘I’. The five parts of the body which act… and their functions… are not ‘I’. The five vital airs such as prana, which perform the five vital functions such as respiration, are not ‘I’. Even the mind that thinks is not ‘I’. In the state of deep sleep vishaya vasanas remain. Devoid of sensory knowledge and activity, even this [state] is not ‘I’. After negating all of the above as ‘not I, not I’, the knowledge that alone remains is itself ‘I’. The nature of knowledge is sat-chit-ananda [being-consciousness-bliss].

Ramana Maharshi