…the fast of truth, which is preventing the heart from worshiping any other than the essence of Allah. It is performed by rendering the eye of the heart blind to all that exists, even in the secret realms outside of this world, except the love of Allah. For although Allah has created all and everything for man, He has created man only for Himself, and He says ‘Man is My secret and I am his secret’. That secret is a light from the divine light of Allah. It is the center of the heart, made out of the finest of matter. It is the soul which knows all the secret truths; it is the secret connection between the created one and his Creator. That secret does not love nor lean towards anything other than Allah.
The Fast of Truth
There is nothing worthy to wish for, there is no other goal, no other beloved in this world and in the hereafter, except Allah. If an atom of anything other than the love of Allah enters the heart, the fast of truth, the true fast, is broken. Then one has to make it up, to revive that wish and intention, to return back to His love, here and in the hereafter. For Allah says: ‘Fasting is only for me, and only I give its reward’.
Secret of Secrets – Ghous Pak Syed Abd al-Qadir Jilani