“Everything in nature completes its action through its own force and species alone… as, for example, fire by its own force dries and consumes and does many things. Therefore vision must perform the act of seeing by its own force. But the act of seeing is the perception of a visible object at a distance, and therefore vision perceives what is visible by its own force multiplied to the object. Moreover, the species of the things of world are not fitted by nature to effect the complete act of vision at once, because of its nobleness. Hence these must be aided by the species of the eye, which travels in the locality of the visual pyramid, and changes the medium and ennobles it, and renders it analogous to vision, and so prepares the passage of the species itself of the visible object… Concerning the multiplication of this species, moreover, we are to understand that it lies in the same place as the species of the thing seen, between the sight and the thing seen, and takes place along the pyramid whose vertex is in the eye and base in the thing seen. And as the species of an object in the same medium travels in a straight path and is refracted in different ways when it meets a medium of another transparency, and is reflected when it meets the obstacles of a dense body; so is it also true of the species of vision that it travels altogether along the path of the species itself of the visible object.”
Bacon, like Grosseteste, asserts that both the active extramitted species of vision from the eye, and the intramitted species of light from object seen, were necessary for sight.
v. i. vii. 4, ed. Briggs as quoted in A.C. Crombie, Robert Grossetest and the Origins of Experimental Science 1100-1700 (1953)
Opus Majus, c. 1267
Help us to complete the source, original and additional information
Roger Bacon 21
medieval philosopher and theologian 1220–1292Related quotes

Effects.
Poetry quotes, New Thought Pastels (1913)

Source: Christianity and the Social Crisis (1907), Introduction, p.xii

A Little Conserva-tive (1936)
Context: My individualism was a logical extension of the anarchist principle beyond its narrow application to one particular form or mode of constraint upon the individual. The thing that interested me, as it interested Emerson and Whitman, was a general philosophy of life which regards human personality as the greatest and most respect-worthy object in the world, and as a complete end-in-itself; a philosophy, therefore, which disallows its subversion or submergence, whether by force of law or by any other coercive force. I was convinced that human beings do better and are happier when they have the largest possible margin of existence to regulate and dispose of as they please; and hence I believed that society should so manage itself as to leave the individual a maximum of free choice and action, even at a considerable risk of results which from the short-time point of view would be pronounced dangerous.

Libri iii, Caput XIII, (XV.) emendati Johann Heinrich F. Karl Witte (1874) p. 25. https://www.google.com/books/edition/De_monarchia_libri_iii_emendati_per_C_Wi/_RhcAAAAQAAJ?hl=en&gbpv=1&pg=PA25&printsec=frontcover Translation as quoted by Hannah Arendt, The Human Condition (1958) p. 175. https://archive.org/details/humancondition0000aren/page/175/mode/1up
De Monarchia (1312-1313)
Original: (la) Nam in omni actione principaliter intenditur ab agente, sive necessitate naturae, sive voluntarie agat, propriam similitudinem explicare, unde fit, quod omne agens, in quantum huiusmodi, delectatur; quia, quum omne quod est appetat suum esse, ac in agendo agentis esse quodammodo amplietur, sequiturde necessitate delectatio... Nihil igitur agit, nisi tale existens, quale patiens fieri debet...

Senate Select Committee on Secret Military Assistance to Iran and the Nicaraguan Opposition (Iran-Contra hearings) (1987)
Video of Inouye's excerpt http://www.youtube.com/watch?v=EbFphX5zb8w
Daniel K. Inouye: Reference of excerpt http://www.nationmaster.com/encyclopedia/Daniel-K.-Inouye
The Mission of Sheltron: Reference http://www.sheltron.us/sheltron/introduction.html

Preface
The History and Present State of Electricity (1767)
Context: The history of philosophy enjoys, in some measure, the advantages both of civil and natural history, whereby it is relieved from what is most tedious and disgusting in both. Philosophy exhibits the powers of nature, discovered and directed by human art. It has, therefore, in some measure, the boundless variety with the amazing uniformity of the one, and likewise every thing that is pleasing and interesting in the other. And the idea of continual rise and improvement is conspicuous in the whole study, whether we be attentive to the part which nature, or that which men are acting in the great scene.
It is here that we see the human understanding to its greatest advantage, grasping at the noblest objects, and increasing its own powers, by acquiring to itself the powers of nature, and directing them to the accomplishment of its own views; whereby the security, and happiness of mankind are daily improved. Human abilities are chiefly conspicuous in adapting means to ends, and in deducing one thing from another by the method of analogy; and where may we find instances of greater sagacity, than in philosophers diversifying the situations of things, in order to give them an opportunity of showing their mutual relations, affections, and influences; deducing one truth and one discovery from another, and applying them all to the useful purposes of human life.
If the exertion of human abilities, which cannot but form a delightful spectacle for the human imagination, give us pleasure, we enjoy it here in a higher degree than while we are contemplating the schemes of warriors, and the stratagems of their bloody art.

“Evil is the force that believes its knowledge is complete.”
Other