Qu. 13. Do not several sorts of Rays make Vibrations of several bignesses, which according to their bigness excite Sensations of several Colours, muc… - Isaac Newton

I wish we could derive the rest of the phenomena of nature by the same kind of reasoning from mechanical principles; for I am induced by many reasons to suspect that they may all depend upon certain forces by which the particles of bodies, by some causes hitherto unknown, are either mutually impelled towards each other, and cohere in regular figures, or are repelled and recede from each other; which forces being unknown, philosophers have hitherto attempted the search of nature in vain; but I hope the principles here laid down will afford some light either to that or some truer method of philosophy.

To explain all nature is too difficult a task for any one man or even for any one age

Upon Christmas-day, the people of Rome, who had hitherto elected their Bishop, and reckoned that they and their Senate inherited the rights of the ancient Senate and people of Rome, voted Charles their Emperor, and subjected themselves to him in such manner as the old Roman Empire and their Senate were subjected to the old Roman Emperors. The Pope [Leo III] crowned him, and anointed him with holy oil, and worshiped him on his knees after the manner of adoring the old Roman Emperors... The Emperor, on the other hand, took the following oath to the Pope: In nomine Christi spondeo atque polliceor, Ego Carolus Imperator coram Deo & beato Petro Apostolo, me protectorem ac defensorem fore hujus sanctæ Romanæ Ecclesiæ in omnibus utilitatibus, quatenùs divino fultus fuero adjutorio, prout sciero poteroque. The Emperor was also made Consul of Rome, and his son Pipin crowned King of Italy: and henceforward the Emperor styled himself: Carolus serenissimus, Augustus, à Deo coronatus, magnus, pacificus, Romæ gubernans imperium [Charles, most serene Augustus crowned by God, the great, peaceful emperor ruling the Roman empire], or Imperator Romanorum [Emperor of the Romans]; and was prayed for in the Churches of Rome. His image was henceforward put upon the coins of Rome: while the enemies of the Pope, to the number of three hundred Romans and two or three of the Clergy, were sentenced to death. The three hundred Romans were beheaded in one day in the Lateran fields: but the Clergymen at the intercession of the Pope were pardoned, and banished into France. And thus the title of Roman Emperor, which had hitherto been in the Greek Emperors, was by this act transferred in the West to the Kings of France.