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The absence of any "hardship" in the religion of Islam is due to several factors: (1) it is free of any dogma or mystical proposition which might make the Qur'anic doctrine difficult to understand or might even conflict with man's innate reason; (2) it avoids all complicated ritual or system of taboos which would impose undue restrictions on man's everyday life; (3) it rejects all self-mortification and exaggerated asceticism, which must unavoidably conflict with man's true nature (cf. in this connection note [118] on the first sentence of 2:143 ); and (4) it takes fully into account the fact that "man has been created weak" ( 4:28 ).
Abraham is designated here as "your forefather" not only because he was, in fact, an ancestor of the Prophet Muhammad - to whose followers this passage is addressed - but also because he is the prototype (and thus, the spiritual "forefather") of all who consciously "surrender themselves to God" (see next note).
The term muslim signifies "one who surrenders himself to God"; correspondingly, islam denotes "self-surrender to God". Both these terms are applied in the Qur'an to all who believe in the One God and affirm this belief by an unequivocal acceptance of His revealed messages. Since the Qur'an represents the final and most universal of these divine revelations, the believers are called upon, in the sequence, to follow the guidance of its Apostle and thus to become an example for all mankind (cf. 2:143 and the corresponding note [119]).
i.e., Muslims.
As far as the striving is concerned with Jihad in the narrow sense, see the limitations in n. 204 to ii. 190 and n. 205 to ii. 191. But the words are perfectly general and apply to all true and unselfish striving for spiritual good.
The Jews were hampered by many restrictions, and their religion was racial. Christianity, as originally preached, was a hermit religion: "sell whatsoever thou hast" (Mark x. 21); "take no thought for the morrow" (Matt. vi. 34). Islam, as originally preached, gives freedom and full play to man's faculties of every kind. It is universal, and claims to date from Adam: father Abraham is mentioned as the great Ancestor of those among whom Islam was first preached (Jews, Christians, and Arabs).
Before: see Abraham's prayer in ii. 128. In this revelation: in this very verse, as well as in other places.
See ii. 143, and notes 143 and 144. As the Prophet is a guide and exemplar among us, so Muslims ought to be exemplars amongst mankind. The best witness to Allah's Truth are those who show its light in their lives.