"I cannot sufficiently be astonished that such is the insanity of some men, such the impiety of their blinded understanding, such, finally, their lust after error, that they will not be content with the rule of faith delivered once and for all from antiquity, but must daily seek after something new, and even newer still, and are always longing to add something to religion, or to change it, or to subtract from it!"

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No one really knew the sciences except the Lord Robert, Bishop of Lincoln, by reason of his length of life and experience, as well as of his studiousness and zeal. He knew mathematics and perspective, and there was nothing which he was unable to know; and at the same time he was sufficiently acquainted with languages to be able to understand the saints and the philosophers and the wise men of antiquity but his knowledge of languages was not such as to enable him to effect translations until the latter portion of his life.

— Roger Bacon