“The intellect is at home in that which is fixed only because it is done and over with, for intellect is itself just as much a deposit of past life as is the matter to which it is congenial. Intuition alone articulates in the forward thrust of life and alone lays hold of reality.”

1850s, Latter-Day Pamphlets (1850), The New Downing Street (April 15, 1850)

Religion Without God (1928). p. 90

Yo no estimo tesoros ni riquezas;
y así, siempre me causa más contento
poner riquezas en mi pensamiento
que no mi pensamiento en las riquezas.
Sonnet 146, as translated by Edith Grossman in Sor Juana Inés de la Cruz: Selected Works (2014)
Alternate translation: I do not value treasures or riches; it always gives me more pleasure to put wealth in my thought than thought in my wealth.

Source: Five Questions Concerning the Mind (1495), pp. 203-204

The Renaissance in India (1918)

Wir haben nicht zuviel Verstand und zu wenig Seele, sondern wir haben zu wenig Verstand in den Fragen der Seele.
Helpless Europe (1922)

In the 1661 translation by Thomas Salusbury: … such are the pure Mathematical sciences, to wit, Geometry and Arithmetick: in which Divine Wisdom knows infinite more propositions, because it knows them all; but I believe that the knowledge of those few comprehended by humane understanding, equalleth the divine, as to the certainty objectivè, for that it arriveth to comprehend the neces­sity thereof, than which there can be no greater certainty." p. 92 (from the Archimedes Project http://archimedes.mpiwg-berlin.mpg.de/cgi-bin/toc/toc.cgi?page=92;dir=galil_syste_065_en_1661;step=textonly)
In the original Italian: … tali sono le scienze matematiche pure, cioè la geometria e l’aritmetica, delle quali l’intelletto divino ne sa bene infinite proposizioni di piú, perché le sa tutte, ma di quelle poche intese dall’intelletto umano credo che la cognizione agguagli la divina nella certezza obiettiva, poiché arriva a comprenderne la necessità, sopra la quale non par che possa esser sicurezza maggiore." (from the copy at the Italian Wikisource).
Dialogue Concerning the Two Chief World Systems (1632)

Letter to Dorothy Day (20 December 1961).
Context: Persons are not known by intellect alone, not by principles alone, but only by love. It is when we love the other, the enemy, that we obtain from God the key to an understanding of who he is, and who we are. It is only this realization that can open to us the real nature of our duty, and of right action. To shut out the person and to refuse to consider him as a person, as an other self, we resort to the impersonal "law" and to abstract "nature." That is to say we block off the reality of the other, we cut the intercommunication of our nature and his nature, and we consider only our own nature with its rights, its claims, it demands. And we justify the evil we do to our brother because he is no longer a brother, he is merely an adversary, an accused. To restore communication, to see our oneness of nature with him, and to respect his personal rights and his integrity, his worthiness of love, we have to see ourselves as similarly accused along with him … and needing, with him, the ineffable gift of grace and mercy to be saved. Then, instead of pushing him down, trying to climb out by using his head as a stepping-stone for ourselves, we help ourselves to rise by helping him to rise. For when we extend our hand to the enemy who is sinking in the abyss, God reaches out to both of us, for it is He first of all who extends our hand to the enemy. It is He who "saves himself" in the enemy, who makes use of us to recover the lost groat which is His image in our enemy.

Source: Liberalism (1927), Ch. 1 : The Foundations of Liberal Policy § 10 : The Argument of Fascism
Context: Repression by brute force is always a confession of the inability to make use of the better weapons of the intellect — better because they alone give promise of final success. This is the fundamental error from which Fascism suffers and which will ultimately cause its downfall. The victory of Fascism in a number of countries is only an episode in the long series of struggles over the problem of property. The next episode will be the victory of Communism. The ultimate outcome of the struggle, however, will not be decided by arms, but by ideas. It is ideas that group men into fighting factions, that press the weapons into their hands, and that determine against whom and for whom the weapons shall be used. It is they alone, and not arms, that, in the last analysis, turn the scales.
So much for the domestic policy of Fascism. That its foreign policy, based as it is on the avowed principle of force in international relations, cannot fail to give rise to an endless series of wars that must destroy all of modern civilization requires no further discussion. To maintain and further raise our present level of economic development, peace among nations must be assured. But they cannot live together in peace if the basic tenet of the ideology by which they are governed is the belief that one's own nation can secure its place in the community of nations by force alone.
It cannot be denied that Fascism and similar movements aiming at the establishment of dictatorships are full of the best intentions and that their intervention has, for the moment, saved European civilization. The merit that Fascism has thereby won for itself will live on eternally in history. But though its policy has brought salvation for the moment, it is not of the kind which could promise continued success. Fascism was an emergency makeshift. To view it as something more would be a fatal error.