On The Shari`a

First of all it is Islam that reigns (see Sura 5:3). Traditional Islam does not accept the notion that the world-religions (or even any other man-made belief systems) are equally valid roads to God - Allah, these are perennialist interpretations.

◊ Even so - except for elements of corruption and deviation - they still reflect some sacred truth, they did not turn into complete falsehood by being abrogated.

◊ In the words of Muhyiddīn Ibn `Arabi:

”The religious laws (shara`ī - of different religions) are all lights, and the law of Muhammad ( Allah bless him and give him peace ) among these lights is as the sun's light among the light of the stars…” [more]

And he wrote:
”So all paths return to look to the Prophet's path (Allah bless him and give him peace): if the prophetic messengers had been alive in his time, they would have followed him just as their religious laws have followed his law.…”