 the most honorable part of a human being is his two eyes which are black. the most honorable kohl is antimony which is black. that is why it was said that god will admit all believers into paradise bareheaded beardless and kohllined.
وأكرم ما في الإنسان حدقتاه؛ وهما سوداوان. وأكرم الأكحال الإثمد، وهو أسود. ولذلك جاء أن الله يدخل جميع المؤمنين الجنة جردا مردا مكحلين.