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In the original, this passage is in the past tense ("He brought forth", "He asked them", etc.) thus stressing the continuous recurrence of the above metaphorical "question" and "answer": a continuity which is more clearly brought out in translation by the use of the present tense. According to the Qur'an, the ability to perceive the existence of the Supreme Power is inborn in human nature (fitrah); and it is this instinctive cognition - which may or may not be subsequently blurred by self-indulgence or adverse environmental influences - that makes every sane human being "bear witness about himself" before God. As so often in the Qur'an, God's "speaking" and man's "answering" is a metonym for the creative act of God and of man's existential response to it.
This passage has led to differences of opinion in interpretation. According to the dominant opinion of commentators each individual in the posterity of Adam had a separate existence from the time of Adam, and a Covenant was taken from all of them, which is binding accordingly on each individual. The words in the text refer to the descendants of the Children of Adam, i.e., to all humanity, born or unborn, without any limit of time. Adam's seed carries on the existence of Adam and succeeds to his spiritual heritage. Humanity has been given by Allah certain powers and faculties, whose possession creates on our side special spiritual obligations which we must faithfully discharge: see v. 1. and n. 682. These obligations may from a legal point of view be considered as arising from implied Covenants. In the preceding verse (vii. 171) a reference was made to the implied Covenant of the Jewish nation. Now we consider the implied Covenant of the whole of humanity, for the Holy Prophet's mission was world-wide.
The Covenant is completed in this way. We acknowledge that Allah is our Creator, Cherisher, and Sustainer: therefore we acknowledge our duty to Him: when we so testify concerning ourselves, the obligation is as it were assumed by us; for it follows from our very nature when it is pure and uncorrupted.