In Chapter 15, Poem 5 of Attar's Mokhtar Nameh, the poet laments the isolation of the spiritual seeker who has undergone profound inner trials (the tested heart). The core concept is that communicating ultimate mystical experiences requires a listener who is entirely 'selfless' or spiritually annihilated from the ego (bikhwishtan). Because the speaker has never encountered such an ego-less individual, the profound states of his mystical journey must remain an unspoken secret.