From The Promulgation of Universal Peace, p. 28
The Blessed Perfection was a prisoner twenty-five years. During all this time he was subjected to the indignities and revilements of the people. He was persecuted, mocked and put in chains. ...
During His lifetime He was intensely active. His energy was unlimited. Scarcely one night was passed in restful sleep. He bore these ordeals, suffered these calamities and difficulties in order that a manifestation of selflessness and service might become apparent in the world of humanity, that the Most Great Peace should become a reality, that human souls might appear as the angels of heaven, that heavenly miracles would be wrought among men; that human faith should be strengthened and perfected; that the precious, priceless bestowal of God -- the human mind -- might be developed to its fullest capacity in the temple of the body; and that man might become the reflection and likeness of God, even as it hath been revealed in the Bible, 'Let us make man in our image.'
Briefly, the Blessed Perfection bore all these ordeals and calamities in order that our hearts might become enkindled and radiant, our spirits be glorified, our faults become virtues, our ignorance be transformed into knowledge; in order that we might attain the real fruits of humanity and acquiree heavenly graces; in order that, although pilgrims upon earth, we should travel the road of the heavenly kingdom, and although needy and poor, we might receive the treasures of eternal life. For this has He borne these difficulties and sorrows.
From The Promised Day is Come, p. vi
Mirza Husayn-'Ali, surnamed Baha'u'llah (the Glory of God), a native of Mazindaran, Whose advent the Bab [Herald and Forerunner of Baha'u'llah] had foretold, ... was imprisoned in Tihran, was banished, in 1852, from His native land to Baghdad, and thence to Constantinople and Adrianople, and finally to the prison city of Akka, where He remained incarcerated for no less than twenty-four years, and in whose neighborhood He passed away in 1892. In the course of His banishment, and particularly in Adrianople and Akka, He formulated the laws and ordinances of His Dispensation, expounded, in over a hundred volumes, the principles of His Faith, proclaimed His Message to the kings and rulers of both the East and the West, both Christian and Muslim, addressed the Pope, the Caliph of Islam, the Chief Magistrates of the Republics of the American continent, the entire Christian sacerdotal order, the leaders of Shi'ih and Sunni Islam, and the high priests of the Zoroastrian religion. In these writings He proclaimed His Revelation, summoned those whom He addressed to heed His call and espouse His Faith, warned them of the consequences of their refusal, and denounced, in some cases, their arrogance and tyranny....