John Peckham

As you see double if you push the eye out of its place with your finger; so prelates, through evil counsel, judge a priest to be worthy of two benefices, when he ought to be contented with one.

— John Peckham

Formerly the Church with its prelates of old time, was golden in wisdom, silver in cleanness of life, brazen in eloquence, which are three things needful to a preacher; that is, brightness of wisdom, cleanness of life, and sonorousness of eloquence. But of the feet, the last, that is the modern prelates, part is iron through their hardness of heart, and part is clay by their carnal luxury.

— John Peckham

[Perspectiva communis was written to] compress into concise summaries the teachings of perspective, which [in existing treatises] are presented with great obscurity.

— John Peckham

Light from a concave luminous body is received most powerfully at the centre. The reason for this is that, for every point of a concave body, perpendicular rays, which are stronger than others, converge in the centre. Therefore the virtues of celestial bodies are incident most powerfully in and near the centre of the world.

— John Peckham