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سُبْحَانَ ٱللَّٰهِ
Holy Qur'an
Al-Qur'an
Kids Qur'an
Implying that on Resurrection Day they will be irretrievably separated from all whom they had loved, and all who had been close to them in this world. The "loss of one's own self" signifies, I think, the destruction of one's true identity and uniqueness as a human being, which is described in the next clause as "the most obvious loss" that man may be made to suffer in the life to come.
The cult of Evil results in the destruction of all that is best and most valuable in us, as well as poisons all the affections which link us to our families, friends, and people, in the Final Adjustment, which we call the Day of Judgment.
This is not a command or permission but a reproach and warning. The address of the Prophet of Allah may be paraphrased thus: 'Whatever happens I will follow the command of Allah. He has revealed Himself, and I know that He is One, supreme over all creatures. Him alone will I serve. Is there any so ignorant as to seek anyone else? Let him do so and see the result. The loss will be his own. For he falls from Grace into Evil.'