7. The circulation of the winds implies the circulation of the different kinds of winds at different times, on different parts of the earth and at different heights, which cause change of the seasons. What deserves attention is not only that above the surface of the earth there is a thick atmosphere, which contains all those elements needed by living beings for breathing, and this thick covering has kept the earth’s population safe from many of the heavenly calamities. Besides, another noteworthy thing is that the air is not just filled inertly in the atmosphere, but it blows occasionally in different ways. Sometimes a cool wind blows and sometimes a hot wind. Sometimes it stops blowing and sometimes it starts blowing. Sometimes it blows soft and sometimes strong, and sometimes it assumes the proportions of a storm. Sometimes a dry wind blows and sometimes a moist wind. Sometimes it brings the rain and sometimes it drives away the clouds. These different kinds of the winds do not blow without a purpose, but under a law and a system, which testifies that this arrangement is based on perfect wisdom, and it is serving great objectives. Then it is deeply related with coolness and heat, which go on increasing and decreasing according to the changing conditions and relationships between the earth and the sun. Furthermore, it has a deep relation with the seasonal changes and the distribution of the rain. All these facts proclaim that these arrangements have not been made haphazardly by some blind nature. Nor the sun and the earth and the air and water and vegetation and animals have separate controllers, but inevitably One God alone is the Creator of them all, and it is His Wisdom that has established this system for a great objective, and it is His power that it is functioning regularly according to a preordained law.