Nasir-i Khusraw in his Wajh-i Din: Discourse 23 writes that exoterically Eid-ul-Fitr is the day when the fast breakers are liberated from the fast and can obtain food and drink and attain physical strength.
Similarly, the human soul also requires its own type of food – which is knowledge. And Eid-ul-Fitr, esoterically, refers to the Mawlana ‘Ali, because his esoteric interpretation (tawil) liberates the people from the lack of knowledge and allows them to attain spiritual strength by gaining knowledge of the tawil. Just as on Eid, the fast-breakers become eaters, through the knowledge brought by Mawlana ‘Ali, the silent ones become speakers – in that they are able to share and discuss knowledge with each other and rejoice with the tawil.
Source: ismailignosis.com