Some others have also said that it is the shade of objects...

Some others have also said that it is the shade of objects that forms in afternoon and it gradually expands.

Of course, if there were not the next sentences, we would understand an extensive meaning from this sentence that includes all shades, but other indications that have come later show that the first commentary is more proper, for the verse continues: “...then We have made the sun an indication of it;” This refers to the fact that if there was not the sun, the concept of shade would not be clear.

Basically, shade is formed by rays of the sun, for shade is usually partial darkness that happens for objects. It happens when light is cast on an impassible object and in front of it a shade will be formed. Therefore, we must not only know shade by light according to the law ‘know objects by their opposites’, but also the existence of shade is caused by light.

In the next verse, Allah says: “Then We draw it in towards Ourselves...” We know that when sun rises, shades are gradually taken away until noontime that there will be no shade in some areas for the sun is above every creature, and in other areas it will be in its minimum size. Therefore, shades neither appear instantly nor are taken away instantly. This is one of the wisdoms of Allah, for if this changing of light and darkness happened immediately, it would surely be harmful for all creatures.

This gradual system of changing is in a way that it has the most benefits for all creatures without having any harm. The Arabic word /yasira/ (gradual) refers to the gradual withdrawal of shades, or it refers to this matter that special system of light and darkness is a simple and easy thing comparing with the might of Allah. The Qur’anic word /’ilayna/ also emphasizes this divine might.

The holy verse continues saying: “...by an easy (gradual) contraction.” Anyway, there is no doubt that as man needs light in his life, he needs shade for modification and prevention of intense light. Continual light makes life deranged, as stable and permanent shade is fatal. In the first case, all creatures would be burnt and in the second case all creatures would be frozen. This alternative system of light and shade makes life pleasant and possible for man.