“We deny the right of any portion of the species to decide for another portion what is and what is not their ‘proper sphere’. The proper sphere for all human beings is the largest and highest which they are able to attain to.”

Conclusion : The Moral of this Examination
A Perplexed Philosopher (1892)
Context: Stepping out of their proper sphere and arrogating to themselves an authority to which they have no claim, professed teachers of spiritual truths long presumed to deny the truths of the natural sciences. But now professed teachers of the natural sciences, stepping in turn out of their proper sphere and arrogating to themselves an authority to which they have no claim, presume to deny spiritual truths. And there are many, who having discarded an authority often perverted by the influence of dominant wrong, have in its place accepted another authority which in its blank materialism affords as efficient a means for stilling conscience and defending selfish greed as any perversion of religious truth.
Mr. Spencer is the foremost representative of this authority. Widely regarded as the scientific philosopher; eulogized by his admirers as the greatest of all philosophers — as the man who has cleared and illuminated the field of philosophy by bringing into it the exact methods of science — he carries to the common mind the weight of the marvelous scientific achievements of our time as applied to the most momentous of problems. The effect is to impress it with a vague belief that modern science has proved the idea of God to be an ignorant superstition and the hope of a future life a vain delusion.

Source: Meditations (c. AD 121–180), Book VIII, 41

Source: Guide for the Perplexed (c. 1190), Part III, Ch.17

Letter to Abigail Adams about the Sedition Acts (1804) https://founders.archives.gov/documents/Jefferson/99-01-02-0348
1800s, First Presidential Administration (1801–1805)
Context: You seem to think it devolved on the judges to decide on the validity of the sedition law. but nothing in the constitution has given them a right to decide for the executive, more than to the Executive to decide for them. Both magistracies are equally independant in the sphere of action assigned to them. The judges, believing the law constitutional, had a right to pass a sentence of fine and imprisonment; because that power was placed in their hands by the constitution. But the Executive, believing the law to be unconstitutional, was bound to remit the execution of it; because that power has been confided to him by the constitution That instrument(The Constitution) meant that its coordinate branches should be checks on each other. But the opinion which gives to the judges the right to decide what laws are constitutional and what not, not only for themselves in their own sphere of action but for the Legislature and Executive also in their spheres, would make the Judiciary a despotic branch.

Source: The Analects, Other chapters

Source: "Socialized medicine in U.S. is inevitable!", WorldNetDaily, 2007-09-20 http://www.worldnetdaily.com/news/article.asp?ARTICLE_ID=34741,

Ibid., p. 133
[X]: text missing in the manuscript.
The Book of Disquiet
Original: Contentar-se com o que lhe dão é próprio dos escravos. Pedir masi é próprio das crianças. Conquistar mais é próprio dos loucos [porque toda a conquista é [X]]

p, 125
On the Sizes and Distances of the Sun and the Moon (c. 250 BC)

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The Differential and Integral Calculus (1836)