The arrays of Islamic congregational prayers for a suppos edobserver, watching the earth from outside, resemble the concentric circles gathering around a center, and this indicates a perfect unity.

Islamic scales have been adopted based on natural scales asfar as possible, which are identical for all, and there is no colorof a special nationality, and for determination of some subjects, for instance, pace, palm and such like are used.

Islamic month and year are focused on the circulation ofmoon and sun( or more correctly circulation of earth around thesun ), and they are identical for everybody, and there is no needto technical specialty for understanding them, and there is nodifference in them save in view of difference in horizon, which isthe natural property of different parts of the earth.

1- Moral development

The forgotten principles without which the world will notexperience peace and tranquility

As we already told, for formation of a real society, especiallyin a great global scale including all people of world, moral development is required in addition to ideological unity and mental development.

Without a moral development, the people living in a societycan never tolerate each other, and solve the opposite sides ofdifferent mentalities and dissidences properly.

Like training of other moral aspects, the need of this part tothe instructions of prophets and messengers is more clear thanany other part, because as we said before, morality without theexecutive guarantee of belief and the religion of prophets will nothave a strong support, and does not exceed a series ofinessential perfections and dispensable advices.