Consequently, a Divine Mercy is activated and a reverent personality is sent by God for the guidance of mankind, now and again. A transcendental guidance appears in a shape of a prophet or a saint . A divine guidance provides a complete and comprehensive roadmap towards peace and happiness at all aspects of life, material as well as spiritual. The reverent personalities are demand of every individual, followers as well as leaders or young as well as mature. Muslims follow the footprints of the life patterns of reverent personalities. Consequently, a judicious and merciful civilization is shaped. Muslim civilization is chiefly outcome of righteous and noble personalities.A person is highly dependent on others in his early phase of life, first 20 years. The next 20 years of an individual are spent on development of a fully matured attitude towards diverse and conflicting life affairs. The second phase of life, 20 to 40 , is filled with multiple, multi-layered, and multi-dimensional observations / experiences. It is phase of thinking and rethinking, finally, a person is matured, generally, at the age of 40. A fully matured generation is responsible of all affairs of a nation. However, the life affairs are extremely complex, even a matured individual is, sometime, unable to solve / tackle the riddles of life. A responsible generation, belongs to any temporal-spatial environ, too, has strong tendency or need or demand for some reverent personality for proper and merciful guidance. They have faith on Unity of God and unity of mankind. A recent decline or fall phenomenon occurred with Islamic world at first half of 20th century. The Ottoman Empire collapsed in 1920s due to our collective blunders and conspiracies of imperial forces. The whole Muslim world was facing cruel and inhuman control of Western Powers. Peril of socialism had also come into being and devouring the Muslim world. There were only few waves of awakening among Muslims but it was not possible for any Muslim region / country to live or survive without the shelter of capitalism or socialism . A civilization must face survival / growth challenges. Muslim civilization faced / managed manifold challenges, both internal as well as external, during her lifetime. Islamic World endured hard times and enjoyed glorious periods. A recurrent rise and fall phenomena remained with Muslims, however, a permanent decline or fall or disintegration of Muslims is impossible due to Qaranic verdict about sustainability of Islam and Muslims. In addition, Muslims are stability factor for mankind because they are custodian & follower of last message / messenger of Allah.