It is a state of existence only on the mind. It has no connection with the senses. That pure state should be attained to by the understanding alone.
वाक्सम्भाषाप्रवृत्तं यत् तन्मनःपरिवर्जितम्। बुद्ध्या चाध्यवसीयीत ब्रह्मचर्यमकल्मषम्॥