“I can prove now, for instance, that two human hands exist. How? By holding up my two hands, and saying, as I make a certain gesture with the right hand, "Here is one hand," and adding, as I make a certain gesture with the left, "and here is another." And if, by doing this, I have proved ipso facto the existence of external things, you will all see that I can also do it now in numbers of other ways: there is no need to multiply examples.”

With My Own Two Hands.
Song lyrics, Diamonds on the Inside (2003)

Source: We Were Liars

Source: Erak's Ransom

Source: Nick & Norah's Infinite Playlist

Curtain - Poirot's Last Case (1975)
Context: I have no more now to say. I do not know, Hastings, if what I have done is justified or not justified. No — I do not know. I do not believe that a man should take the law into his own hands... But on the other hand, I am the law! As a young man in the Belgian police force I shot down a desperate criminal who sat on a roof and fired at people below. In a state of emergency martial law is proclaimed.

Clark, Speech to the Indian Chiefs at Cahokia (1778) http://www.kdla.ky.gov/resources/KYGRClark.htm

Source: The Book Of Counted Sorrows

Reflections on a chestnut tree root.
Nausea (1938)
Context: Absurd, irreducible; nothing — not even a profound and secret delirium of nature — could explain it. Obviously I did not know everything, I had not seen the seeds sprout, or the tree grow. But faced with this great wrinkled paw, neither ignorance nor knowledge was important: the world of explanations and reasons is not the world of existence. A circle is not absurd, it is clearly explained by the rotation of a straight segment around one of its extremities. But neither does a circle exist. This root, on the other hand, existed in such a way that I could not explain it.

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 135.