“Every progress has its bill of costs and only those who pay for it will have that progress.”
Dr. Babasaheb Ambedkar in the Bombay Legislature https://archive.org/stream/Ambedkar_CompleteWorks/13A.%20Dr.%20Ambedkar%20in%20the%20Bombay%20Legislature%20PART%20I_djvu.txt
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Bhimrao Ramji Ambedkar 65
Father of republic India, champion of human rights, father … 1891–1956Related quotes

Why I am an atheist? (1930)
Context: Any man who stands for progress has to criticize, disbelieve and challenge every item of the old faith. Item by item he has to reason out every nook and corner of the prevailing faith. If after considerable reasoning one is led to believe in any theory or philosophy, his faith is welcomed. His reasoning can be mistaken, wrong, misled and sometimes fallacious. But he is liable to correction because reason is the guiding star of his life. But mere faith and blind faith is dangerous: it dulls the brain, and makes a man reactionary.

“Error is the price we pay for progress.”
1920s, Process and Reality: An Essay in Cosmology (1929)

“He denounced the motives of those who engineer this progress.”
Footnote: Tolstoy What is to be Done? http://books.google.com/books?id=P4dGAQAAIAAJ& (1899) pp.219
p. 76
Why We Fail as Christians (1919)
Context: He [Tolstoy] denounced science and all the products of the mechanical era, including "steam-engines, and telegraphs, photographs, telephones, sewing-machines, phonographs, electricity, telescopes, spectroscopes, microscopes, chloroform, Lister bandages, carbolic acid... All this progress is very striking indeed;" he writes, "but owing to some unlucky chance... this progress has not as yet ameliorated, but it has rather deteriorated the condition of the working man... [It is] these very... machines which have deprived him of his wages, and brought him to a state of entire slavery to the manufacturer." He denounced the motives of those who engineer this progress.

“Progress in meditation comes swiftly for those who try their hardest.”
The Mahābhāṣya

Source: Humanity Comes of Age, A study of Individual and World Fulfillment (1950), Introduction p. I - XII

Source: The Natural System of Political Economy (1837), pp. 42–43

1930s, Second inaugural address (1937)

“There has been progress in design, but not progress in accomplishment.”
Source: The Blind Watchmaker (1986), Chapter 7 “Constructive Evolution” (p. 186)