Their greed...
Their greed, by persistent work, would have caused serious bodily disturbances, for many are so constituted that unless the night becloud them, they would enjoy no comfort and rest, in the pursuit of livelihood and the accumulation of wealth. Perpetual sunshine would have heated the earth with repercussions on the lives of the animals and plants.
The Almighty Allah has, therefore, ordained that there shall be periods of sunshine and darkness, like the lamp which is lit up as the household needs and it is put out when not needed, to give them comfort and rest. Light and darkness are opposed to each other and yet both are made subservient to the interests of the world's betterment and amelioration.
The Four Seasons Then consider the four seasons of the year, as a result of the elevation and inclination of the sun and the benefits and planning thereof. The trees and plants get an upsurge of vital two periods of the sun's movement. The condensation of vapour in the air causes clouds and rain. The animals get their bodies re-invigorated in this season. There is an upsurge of vital heat in the summer as well with the production of the material which matures in winter.
The plants get flowers and fruit in this season. The animals get excitement to sexuality. The air is heated in summer which leads to the ripening of fruit. The waste products of the body get accentuated. The earth gets dried up and becomes fit for building and other performance. Air is purified in winter, ailments are negotiated. Physical bodies become healthful. Night gets longer and thus aids in the performance of certain tasks because of the longer periods.
The air in this season suits other performance as well, which will take a lot of time to expatiate. The Sun Now consider the motion of the sun through the twelve Zodiac belts to complete a year and the skill underlying it. This the period that comprises the four seasons - Winter, Summer, Autumn and Spring, in their completeness. Grains and fruits ripen during this annual movement of the sun to meet human needs. The cycle of development goes on repeating.
Don't you know that the sweep of this sun across the heavenly belt., from the Pisces belt back to it, constitutes one year? The year, etc., have continued as the calculating measures of time since the beginning of the world in all past ages. People calculate thereby the periods of life-spans, loans, contracts and other business matters.