“For as the aged, or those whose sight is defective, when any books however fair, is set before them, though they perceive that there is something written are scarcely able to make out two consecutive words, but, when aided by glasses, begin to read distinctly, so Scripture, gathering together the impressions of Deity, which, till then, lay confused in our minds, dissipates the darkness, and shows us the true God clearly.”

We clearly gather from all these that nothing should be added to sacred scripture nor anything removed from it. To decide by way of teaching, therefore, which assertion should be considered catholic, which heretical, chiefly pertains to theologians, the experts on divine scripture.
You see that I have set out opposing assertions in response to your question and I have touched on quite strong arguments in support of each position. Therefore consider now which seems the more probable to you.
Vol. I, Book 1, Ch. 2.
Dialogus (1494)

As quoted in The Leader's Digest : Timeless Principles for Team and Organization (2003) by Jim Clemmer, p. 84

Source: Think Big: Unleashing Your Potential for Excellence

I, xxi, 41. Modern translation by J.H. Taylor
De Genesi ad Litteram

Aussitôt qu'une pensée vraie est entrée dans notre esprit, elle jette une lumière qui nous fait voir une foule d'autres objets que nous n'apercevions pas auparavant.
As quoted in A Dictionary of Thoughts: Being a Cyclopedia of Laconic Quotations from the Best Authors of the World, both Ancient and Modern (1908) by Tyron Edwards.

"On the Sufferings of the World"
Parerga and Paralipomena (1851), Studies in Pessimism

Reported in Josiah Hotchkiss Gilbert, Dictionary of Burning Words of Brilliant Writers (1895), p. 40.

A Narrative of Some of the Lord's Dealings with George Müller Written by Himself, First Part.
First Part of Narrative

Source: Aphorisms and Reflections (1901), pp. 11-12
Context: The multitude are matter-of-fact. They live in commonplace concerns and interests. Their problems are, how to get more plentiful and better food and drink, more comfortable and beautiful clothing, more commodious dwellings, for themselves and their children. When they seek relaxation from their labors for material things, they gossip of the daily happenings, or they play games or dance or go to the theatre or club, or they travel or they read story books, or accounts in the newspapers of elections, murders, peculations, marriages, divorces, failures and successes in business; or they simply sit in a kind of lethargy. They fall asleep and awake to tread again the beaten path. While such is their life, it is not possible that they should take interest or find pleasure in religion, poetry, philosophy, or art. To ask them to read books whose life-breath is pure thought and beauty is as though one asked them to read things written in a language they do not understand and have no desire to learn. A taste for the best books, as a taste for whatever is best, is acquired; and it can be acquired only by long study and practice. It is a result of free and disinterested self-activity, of efforts to attain what rarely brings other reward than the consciousness of having loved and striven for the best. But the many have little appreciation of what does not flatter or soothe the senses. Their world, like the world of children and animals, is good enough for them; meat and drink, dance and song, are worth more, in their eyes, than all the thoughts of all the literatures. A love tale is better than a great poem, and the story of a bandit makes Plutarch seem tiresome. This is what they think and feel, and what, so long as they remain what they are, they will continue to think and feel. We do not urge a child to read Plato—why should we find fault with the many for not loving the best books?