When are you going to wake up from the drowsiness of your carelessness and the dizziness of your drunkenness so that you understand what you say and know what you say? You were ordered to understand and then to mention (...) What you do not understand does not mention it. When you say Lâ ilâha Illa Allâh while having a careless heart, absent faculty of understanding and dazed secrecy, you are not practicing Dhikr. (Ahma AL-Ghazali).

“Recall is food for the heart and the soul. If the Believer turns away from it, he becomes like the body deprived of its nourishment. (Ibn Qayyim AL-Jawziyya).