“He does not hesitate to assent to an opinion… that visual rays proceed from the eye”

Period I To the Revival of Letters in Erope
The History and Present State of Discoveries Relating to Vision, Light, and Colours (1772)
Context: Great as Bacon was, he was far from being free from the mistakes and prejudices of those who went before him. Even some of the most wild and absurd opinions of the antients have the sanction of his approbation and authority. He does not hesitate to assent to an opinion... that visual rays proceed from the eye; giving this reason for it, that every thing in nature is qualified to discharge its proper functions by its own powers, in the same manner as the sun, and other celestial bodies. He acknowledges, however, that the presence of light, as well as several other circumstances, is necessary to vision.

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Joseph Priestley 47
English theologian, chemist, educator, and political theori… 1733–1804

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Original: (la) Auctoritas siquidem ex vera ratione processit, ratio vero nequaquam ex auctoritate. Omnis enim auctoritas, quae vera ratione non approbatur, infirma videtur esse. Vera autem ratio, quum virtutibus suis rata atque immutabilis munitur, nullius auctoritatis adstipulatione roborari indigent.

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De Unitate Ecclesiae - On the Unity of the Church (c. 401 – 405)
Context: We may not assent to the teaching even of the Catholic bishops, if at any time they are deceived into opinions contrary to the canonical Scriptures of God; but if they should so fall into error, and yet maintain the bond of unity and charity, let the apostle's saying avail in their case: 'And if in anything ye are otherwise minded, God shall reveal even this unto you.' Now these divine words have so manifest an application to the whole Church, that none but heretics in their stubborn perverseness and blind fury can bark against them. (Cf. Augustine's Reply to Faustus the Manichaean (Contra Faustum), book 11, 5 http://www.google.com/search?tbm=bks&tbo=1&q=%22For+we+are+of+those+of+whom+the+apostle+says%3A+%22And+if+ye+be+otherwise+minded%22&btnG=#q=%22For+we+are+of+those+of+whom+the+apostle+says:+%22And+if+ye+be+otherwise+minded%22&um=1&hl=en&ie=UTF-8&tbo=u&tbm=bks&source=og&sa=N&tab=wp&bav=on.2,or.r_gc.r_pw.&fp=285f39394c4fa235&biw=1247&bih=731 )

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