“There is no kindness at courts, only greed and lies and pain.”

Source: The Forgotten Beasts of Eld (1974), Chapter 3, p. 85.

Annotated Drawings by Eugene J. Martin: 1977-1978

Attributed to Disraeli by Mark Twain in "Chapters from My Autobiography — XX", North American Review No. DCXVIII (JULY 5, 1907) http://www.gutenberg.org/ebooks/19987. His attribution is considered unreliable, and the actual origin is uncertain, with one of the earliest known publications of such a phrase being that of Leonard H. Courtney: see Lies, damned lies, and statistics.
Misattributed

Often attributed to Twain, but he said it was attributed to Benjamin Disraeli and this itself is probably a misattribution: see Lies, damned lies, and statistics and Leonard H. Courtney. Twain did, however, popularize this saying in the United States. His attribution is in the following passage from Twain's Autobiography (1924), Vol. I, p. 246 (apparently written in Florence in 1904) http://www.york.ac.uk/depts/maths/histstat/lies.htm:
Figures often beguile me, particularly when I have the arranging of them myself; in which case the remark attributed to Disraeli would often apply with justice and force: "There are three kinds of lies: lies, damned lies, and statistics".
Misattributed

The Art of Loving (1956)
Context: Envy, jealousy, ambition, any kind of greed are passions; love is an action, the practice of human power, which can be practiced only in freedom and never as a result of compulsion.
Love is an activity, not a passive affect; it is a "standing in," not a "falling for." In the most general way, the active character of love can be described by stating that love is primarily giving, not receiving.

El dolor está arriba, no abajo. Y todos creen que el dolor está abajo. Y todos quieren subir.
Voces (1943)

“The Spirit of Liberty” - speech at “I Am an American Day” ceremony, Central Park, New York City (21 May 1944).
Extra-judicial writings
Context: What do we mean when we say that first of all we seek liberty? I often wonder whether we do not rest our hopes too much upon constitutions, upon laws and upon courts. These are false hopes; believe me, these are false hopes. Liberty lies in the hearts of men and women; when it dies there, no constitution, no law, no court can save it; no constitution, no law, no court can even do much to help it… What is this liberty that must lie in the hearts of men and women? It is not the ruthless, the unbridled will; it is not the freedom to do as one likes. That is the denial of liberty and leads straight to its overthrow. A society in which men recognize no check on their freedom soon becomes a society where freedom is the possession of only a savage few — as we have learned to our sorrow.
What then is the spirit of liberty? I cannot define it; I can only tell you my own faith. The spirit of liberty is the spirit which is not too sure that it is right; the spirit of liberty is the spirit which seeks to understand the minds of other men and women; the spirit of liberty is the spirit which weighs their interests alongside its own without bias; the spirit of liberty remembers that not even a sparrow falls to earth unheeded; the spirit of liberty is the spirit of Him who, near two thousand years ago, taught mankind that lesson it has never learned, but has never quite forgotten; that there may be a kingdom where the least shall be heard and considered side by side with the greatest.