“When a simple man who has no skill in dialectics believes an argument to be true which he afterwards imagines to be false, whether really false or not, and then another and another, he no longer has any faith left, and great disputers, as you know, come to think, at last that they have grown to be the wisest of mankind; for they alone perceive the utter unsoundness and instability of all arguments, or, indeed, of all things, which like the currents in the Euripus, are going up and down in never-ceasing ebb and flow.”

Knowing Yourself: The True in the False (1996)

Article on Philosophy, Vol. 25, p. 667, as quoted in Main Currents of Western Thought : Readings in Western European Intellectual History from the Middle Ages to the Present (1978) by Franklin Le Van Baumer
Variant translation: Reason is to the philosopher what grace is to the Christian. Grace moves the Christian to act, reason moves the philosopher. Other men walk in darkness; the philosopher, who has the same passions, acts only after reflection; he walks through the night, but it is preceded by a torch. The philosopher forms his principles on an infinity of particular observations. … He does not confuse truth with plausibility; he takes for truth what is true, for forgery what is false, for doubtful what is doubtful, and probable what is probable. … The philosophical spirit is thus a spirit of observation and accuracy.
L'Encyclopédie (1751-1766)
Context: Reason is to the philosopher what grace is to the Christian.
Grace causes the Christian to act, reason the philosopher. Other men are carried away by their passions, their actions not being preceded by reflection: these are the men who walk in darkness. On the other hand, the philosopher, even in his passions, acts only after reflection; he walks in the dark, but by a torch.
The philosopher forms his principles from an infinity of particular observations. Most people adopt principles without thinking of the observations that have produced them, they believe the maxims exist, so to speak, by themselves. But the philosopher takes maxims from their source; he examines their origin; he knows their proper value, and he makes use of them only in so far as they suit him.
Truth is not for the philosopher a mistress who corrupts his imagination and whom he believes to be found everywhere; he contents himself with being able to unravel it where he can perceive it. He does not confound it with probability; he takes for true what is true, for false what is false, for doubtful what is doubtful, and probable what is only probable. He does more, and here you have a great perfection of the philosopher: when he has no reason by which to judge, he knows how to live in suspension of judgment...
The philosophical spirit is, then, a spirit of observation and exactness, which relates everything to true principles...

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 201.

" Between Us Now, http://www.poemhunter.com/poem/between-us-now/" lines 21-24, from Poems of the Past and Present (1901)

§ III
1910s, At the Feet of the Master (1911)

Jonathan Edwards, A Treatise Concerning Religious Affections (1746), PART II : Showing What Are No Certain Signs That Religious Affections Are Truly Gracious, Or That They Are Not, Ch. 11: Nothing can be certainly known of the nature of Religious Affections, that they much dispose persons with their mouths to praise and glorify God. <!-- (1831 edition), p. 194, also in Complete Christian Classics (1999), Vol. 1, p. 365 -->
Context: !-- He who has a false hope, has not that sight of his own corruptions which the saint has. A true Christian has ten times more to do with his heart and its corruptions, than a hypocrite: and the sins of his heart and practice, appear to him in their blackness; they look dreadful; and it often appears a very mysterious thing, that any grace can be consistent with such corruption, or should be in such a heart. But a false hope hides corruption, covers it all over, and the hypocrite looks clean and bright in his own eyes.
--> There are two sorts of hypocrites: one that are deceived with their outward morality and external religion; many of which are professed Arminians, in the doctrine of justification: and the other, are those that are deceived with false discoveries and elevations; which often cry down works, and men's own righteousness, and talk much of free grace; but at the same time make a righteousness of their discoveries, and of their humiliation, and exalt themselves to heaven with them. These two kinds of hypocrites, Mr. Shepard, in his Exposition of the Parable of the Ten Virgins, distinguishes by the names of legal and evangelical hypocrites; and often speaks of the latter as the worst. And it is evident that the latter are commonly by far the most confident in their hope, and with the most difficulty brought off from it: I have scarcely known the instance of such a one, in my life, that has been undeceived.

Mahatma Gandhi, The Collected Works Volume 66, New Delhi, 1976, pp. 163-64. As quoted in Goel, S.R. History of Hindu-Christian Encounters (1996)
Posthumous publications (1950s and later)