Martin Svoboda

Variant: Everything should be made as simple as possible, but no simpler.

Variant: It's not that I'm so smart, it's just that I stay with problems longer.

Variant: Great ideas often receive violent opposition from mediocre minds.

Attributed to Einstein by his colleague Léopold Infeld in his book Quest: An Autobiography (1949), p. 291 http://books.google.com/books?id=fsvXYpOSowkC&q=%22garbage+man%22#v=snippet&q=%22garbage%20man%22&f=false
Attributed in posthumous publications

L'égalité sera peut-être un droit, mais aucune puissance humaine ne saura le convertir en fait.
La Duchesse de Langeais http://fr.wikisource.org/wiki/La_Duchesse_de_Langeais (1834), translated by Ellen Marriage, part II.

On porte encore moins facilement la joie excessive que la peine la plus lourde.
Part II, ch. L
Letters of Two Brides (1841-1842)

La solitude est certainement une belle chose, mais il y a plaisir d'avoir quelqu'un qui sache répondre, à qui on puisse dire de temps en temps, que c'est un belle chose. (Solitude is certainly a fine thing; but there is pleasure in having someone who can answer, from time to time, that it is a fine thing.) —Jean-Louis Guez de Balzac, Dissertations chrétiennes et morales (1665), XVIII: "Les plaisirs de la vie retirée".
Misattributed

Quand le despotisme est dans les lois, la liberté se trouve dans les mœurs, et vice versa.
The Wild Ass’s Skin (1831), Part I: The Talisman

Entre le joueur du matin et le joueur du soir il existe la différence qui distingue le mari nonchalant de l'amant pâmé sous les fenêtres de sa belle.
The Wild Ass’s Skin (1831), Part I: The Talisman

Une jeune fille est comme une fleur qu'on a cueillie; mais la femme coupable est une fleur sur laquelle on a marché.
Honorine http://fr.wikisource.org/wiki/Honorine (1845), translated by Clara Bell

Qui parle trop veut tromper.
Part I, ch. VI.
Letters of Two Brides (1841-1842)

Le lys dans la vallée http://fr.wikisource.org/wiki/Le_Lys_dans_la_vall%C3%A9e (1836), translated by Katharine Prescott Wormeley, part II: First Love.
Context: True love is eternal, infinite, always like unto itself; it is equable, pure, without violent demonstration; white hair often covers the head, but the heart that holds it is ever young.

Source: A Daughter of Eve (1839), Ch. 3: The Story of a Happy Woman.

The Wild Ass’s Skin (1831), Part I: The Talisman
Context: Thought is a key to all treasures; the miser’s gains are ours without his cares. Thus I have soared above this world, where my enjoyments have been intellectual joys.

Part I, Meditation V: Of the Predestined http://en.wikisource.org/wiki/The_Physiology_of_Marriage/Part_1/Med_5.
Physiology of Marriage (1829)
Context: Love is the most melodious of all harmonies and the sentiment of love is innate. Woman is a delightful instrument of pleasure, but it is necessary to know its trembling strings, to study the position of them, the timid keyboard, the fingering so changeful and capricious which befits it.

Part I.
Le Père Goriot (1835)
Context: Our heart is a treasury; if you pour out all its wealth at once, you are bankrupt. We show no more mercy to the affection that reveals its utmost extent than we do to another kind of prodigal who has not a penny left.