A sign of the death of the heart: lack of sadness about beneficial actions you have missed, and lack of regret about your mistakes.

The most excellent of those who perform good deeds are those who most often remember God in all situations.

When Allah inspires your tongue to ask, know that He wants to give

Invoking brings the heart closer to the hereafter and keeps the world away from the heart, even though the world is around it. Invoking warns the heedless heart to abandon its pleasures and deceptions.

. . . persist in that invocation until the unity of the world is subsumed for you in a single sphere, so that with the eye of your heart you will see naught in the two worlds save the One.

The realization of 'La ilaha illa Allah' is one of the states of the heart that can be neither expressed by the tongue nor thought out by the mind.

One of the signs of relying on deeds is loss of hope when a misstep occurs.