“The more the fruits of knowledge become accessible to men, the more widespread is the decline of religious belief.”

Source: 2000s, Letter to a Christian Nation (2006), p. 51
Context: Atheism is not a philosophy - it is not even a view of the world. It is simply an admission of the obvious. In fact, "atheism" is a term that should not even exist. No one ever needs to identify himself as a "non-astrologer" or a "non-alchemist." We do not have words for people who doubt that Elvis is still alive or that aliens have traversed the galaxy only to molest ranchers and their cattle. Atheism is nothing more than the noises reasonable people make in the presence of unjustified religious beliefs.

Firas al-Khateeb, Lost Islamic History https://www.amazon.com/Lost-Islamic-History-Reclaiming-Civilisation/dp/1849043973

Jeder hat zunächst den Gottesglauben, den man ihm aufgeschwatzt hat; aber allmählich hat er den, den er verdient.
Bissige Aphorismen, Rowohlt 1994, ISBN 3-499-22061-X, S. 14

Progress and Poverty (1879)
Context: There is, and always has been, a widespread belief among the more comfortable classes that the poverty and suffering of the masses are due to their lack of industry, frugality, and intelligence. This belief, which at once soothes the sense of responsibility and flatters by its suggestion of superiority, is probably even more prevalent in countries like the United States, where all men are politically equal, and where, owing to the newness of society, the differentiation into classes has been of individuals rather than of families, than it is in older countries, where the lines of separation have been longer, and are more sharply, drawn. It is but natural for those who can trace their own better circumstances to the superior industry and frugality that gave them a start, and the superior intelligence that enabled them to take advantage of every opportunity, to imagine that those who remain poor do so simply from lack of these qualities.
But whoever has grasped the laws of the distribution of wealth, as in previous chapters they have been traced out, will see the mistake in this notion. The fallacy is similar to that which would be involved in the assertion that every one of a number of competitors might win a race. That any one might is true; that every one might is impossible.
For, as soon as land acquires a value, wages, as we have seen, do not depend upon the real earnings or product of labor, but upon what is left to labor after rent is taken out; and when land is all monopolized, as it is everywhere except in the newest communities, rent must drive wages down to the point at which the poorest paid class will he just able to live and reproduce, and thus wages are forced to a minimum fixed by what is called the standard of comfort — that is, the amount of necessaries and comforts which habit leads the working classes to demand as the lowest on which they will consent to maintain their numbers. This being the case, industry, skill, frugality, and intelligence can avail the individual only in so far as they are superior to the general level just as in a race speed can avail the runner only in so far as it exceeds that of his competitors. If one man work harder, or with superior skill or intelligence than ordinary, he will get ahead; but if the average of industry, skill, or intelligence be brought up to the higher point, the increased intensity of application will secure but the old rate of wages, and he who would get ahead must work harder still.

Source: The Crisis of the Modern World (1927), p. 59

Pearls of Wisdom

Source: The Bhagavadgītā (1973), p. 169–70. (12.)

The facts and fancies of Mr. Darwin (1862)
Context: It is a more rational belief that man may become a brute than that a brute may become a man; and it is an easier faith that plants and animals may dwindle down into an elemental atom, than that this atom should embrace in its organization, and evolve, all the noble forms of vegetable, animal, and intellectual life.

p, 125
"On the Harmony of Theory and Practice in Mechanics" (Jan. 3, 1856)