Of light. Chap. 40.
* 1.1AS Basilius saith, Light is a kinde in all his partes lyke. Authours speake diuerslye of lyght, what it should bée in deede, whether it bée in substaunce or ac∣cident. Aristotle sayth, That lyght is no bodye, nor streaming out of a bodye. And Damascenus saith, That light hath no substaunce of his owne. And Austen sayth super Genesim. ad litteram, That the lyght is a bodylye substaunce, most simple in kinde of bodyes, and most multiplied and increased in diuerse mat∣ter of workings, most moueable, and passinglye thirling and pearcing, and least letting, and most breeding, and most highlye accordeth and reconcileth things the which bée diuerse and contra∣rye, and is most conuertible, and is grounde and beginning of highest natu∣rall motion, and most perfectible, most gladde and most communicatiue: ther∣fore in bodyes nothing is more profita∣ble then light: and nothing more con∣uenient and conenable, nothing more sayre, nothing more swifte, nothing more subtill. nothing more inpassible or wemlesse, nothing more vertuous found then light. Also Lux and Lumen is light in English, but in Latine is diffe∣rence betweene those two Nounes. For Lumen is a flowing and a streaming that floweth out of the substance of light: but Lux is the sustantiall well, vpon the which Lumen is grounded. For if light in it selfe were accident, needs by it self it wer accident to some thing: & accident by it selfe hath cause of beeing of very forme of his obiect. And so if light in the aire wers accident, it shuld haue cause of being of the very forme of the aire: & that may not bée. Also light chaungeth his subiect, as it is knowne. For light is first in the East, & afterward in the West. And the East light gendereth light that is nexte thereto: & so forth euen to the West: And accident chaungeth not his subiecte, nor worketh not without his subiect, but ther in. And héereby it séemeth that light is not accident. Also if light were accident of the ayre, the aire should sodeinly moue with ye wind out of the East into the West, as the mouing of light is sodein. And so the aire moueth not sodeinly, nor anye other element. Also nothing is more worthy & noble then light: & accident is lesse wor∣thy then the substance: And so it séemeth yt light is not accident. For aire is much lesse worthy, and lesse noble then light. But if light be a body, it is hard to know and vnderstand, how & in what manner light is in the aire, or in any cléere bodie, as in Christall. For two bodyes maye not be at once in the same place. Neuer∣thelesse it is not inconuenient nor im∣possible to set, that lyght is a bodylye substaunce, and that it is at ones with another body: for we see water and ashes ioyned and meddeled togethers, sauing bodie and place of both. And the contei∣ning of either distinguished from other, and the parts of eyther conteined with∣in his owne vtter parte. In what man∣ner wise so euer they be meddeled toge∣thers ashes and water, the water abideth in his corporalnesse, by ioyning and con∣tinuing togethers of his partes: and ashes in his body also. But for this med∣deling and ioyning togethers, they bée not two bodies in the same place: But the water hath his owne place, and the ashes his owne place. So light may bée in the aire, or in euerye each other body,