“It is our duty to help liberate that God who is stifling in us, in mankind, in masses of people living in darkness.”

Catechism of a Revolutionary (1869)

Source: Think Big: Unleashing Your Potential for Excellence

Source: Humanity Comes of Age, A study of Individual and World Fulfillment (1950), Chapter I, Secrets Behind History

Source: The Legacy of Luna (2000), Ch. 7

Remarks by President Obama and Daw Aung San Suu Kyi of Burma in Joint Press Conference at Aung San Suu Kyi Residence in Rangoon, Burma on November 14, 2014 http://www.whitehouse.gov/the-press-office/2014/11/14/remarks-president-obama-and-daw-aung-san-suu-kyi-burma-joint-press-confe
Context: Our struggle for democracy has been carried out with a strong grasp on the principle of nonviolence. And also, we believe in the rule of law. So if you ask how do we propose to resolve all of these problems of violence between communities, between different ethnic groups, we've got to start with rule of law. People have to feel secure before they can start talking to one another. We cannot achieve harmony without security. People who feel threatened are not going to sit down and sort out their problems. So I would like to recommend, as the chair of the Rule of Law and Tranquility Committee -- don't forget that tranquility is also included -- that the government should look to rule of law. It is the duty of the government to make all our people feel secure, and it is the duty of our people to learn to live in harmony with one another.

These statements have been misattributed to Mandela, as being in his inaugural speech of 10 May 1994 http://www.wsu.edu:8080/~wldciv/world_civ_reader/world_civ_reader_2/mandela.html but this is not the case. Rather, they originate with author Marianne Williamson.
Misattributed

Source: Colorless Tsukuru Tazaki and His Years of Pilgrimage

Source: Think Big: Unleashing Your Potential for Excellence

The Foolish Old Man Who Removed the Mountains (1945)
Context: There is an ancient Chinese fable called "The Foolish Old Man Who Removed the Mountains". It tells of an old man who lived in northern China long, long ago and was known as the Foolish Old Man of North Mountain. His house faced south and beyond his doorway stood the two great peaks, Taihang and Wangwu, obstructing the way. He called his sons, and hoe in hand they began to dig up these mountains with great determination. Another graybeard, known as the Wise Old Man, saw them and said derisively, "How silly of you to do this! It is quite impossible for you few to dig up those two huge mountains." The Foolish Old Man replied, "When I die, my sons will carry on; when they die, there will be my grandsons, and then their sons and grandsons, and so on to infinity. High as they are, the mountains cannot grow any higher and with every bit we dig, they will be that much lower. Why can't we clear them away?" Having refuted the Wise Old Man's wrong view, he went on digging every day, unshaken in his conviction. God was moved by this, and he sent down two angels, who carried the mountains away on their backs. Today, two big mountains lie like a dead weight on the Chinese people. One is imperialism, the other is feudalism. The Chinese Communist Party has long made up its mind to dig them up. We must persevere and work unceasingly, and we, too, will touch God's heart. Our God is none other than the masses of the Chinese people. If they stand up and dig together with us, why can't these two mountains be cleared away?