“To such a one my answer is that I have arrived at a nourishing kernel in that I have learnt that a man is not in any difficulty in making a reply according to his faith which he ought to make to those who try to defame our Holy Scripture. When they are able, from reliable evidence, to prove some fact of physical science, we shall show that it is not contrary to our Scripture. But when they produce from any of their books a theory contrary to Scripture, and therefore contrary to the Catholic faith, either we shall have some ability to demonstrate that it is absolutely false, or at least we ourselves will hold it so without any shadow of a doubt. And we will so cling to our Mediator, “in whom are hidden all the treasures of wisdom and knowledge,” that we will not be led astray by the glib talk of false philosophy or frightened by the superstition of false religion. When we read the inspired books in the light of this wide variety of true doctrines which are drawn from a few words and founded on the firm basis of Catholic belief, let us choose that one which appears as certainly the meaning intended by the author. But if this is not clear, then at least we should choose an interpretation in keeping with the context of Scripture and in harmony with our faith. But if the meaning cannot be studied and judged by the context of Scripture, at least we should choose only that which our faith demands. For it is one thing to fail to recognize the primary meaning of the writer, and another to depart from the norms of religious belief. If both these difficulties are avoided, the reader gets full profit from his reading."”

Source: The Upper Room (1888), Ch. XIX: "Thoughts for Young Men"

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)

The Devil's Dictionary (1911)
Source: The Unabridged Devil's Dictionary

The trial of Charles B. Reynolds for blasphemy (1887)
Context: Gentlemen, you can never make me believe — no statute can ever convince me, that there is any infinite Being in this universe who hates an honest man. It is impossible to satisfy me that there is any God, or can be any God, who holds in abhorrence a soul that has the courage to express his thought. Neither can the whole world convince me that any man should be punished, either in this world or in the next, for being candid with his fellow-men. If you send men to the penitentiary for speaking their thoughts, for endeavoring to enlighten their fellows, then the penitentiary will become a place of honor, and the victim will step from it — not stained, not disgraced, but clad in robes of glory.
Let us take one more step.
What is holy, what is sacred? I reply that human happiness is holy, human rights are holy. The body and soul of man — these are sacred. The liberty of man is of far more importance than any book; the rights of man, more sacred than any religion — than any Scriptures, whether inspired or not.
What we want is the truth, and does any one suppose that all of the truth is confined in one book — that the mysteries of the whole world are explained by one volume?
All that is — all that conveys information to man — all that has been produced by the past — all that now exists — should be considered by an intelligent man. All the known truths of this world — all the philosophy, all the poems, all the pictures, all the statues, all the entrancing music — the prattle of babes, the lullaby of mothers, the words of honest men, the trumpet calls to duty — all these make up the bible of the world — everything that is noble and true and free, you will find in this great book.
If we wish to be true to ourselves, — if we wish to benefit our fellow-men — if we wish to live honorable lives — we will give to every other human being every right that we claim for ourselves.

What Difference Does the Holy Spirit Make?

Book 1, p. 7
Cosmotheoros (1695; publ. 1698)

Part II : Opinions Relating to the Doctrine of Atonement, § I : That Christ did not die to make satisfaction for the sins of men.
An History of the Corruptions of Christianity (1782)

The Woman's Bible (1898)