“Flies used to be happy-go-lucky, on their own; the sun’s out, have a fly about. Now, there’s little attacks going on.”

Source: The Hollow

And Sir Richard said again: "We be all good English men.
Let us bang these dogs of Seville, the children of the devil,
For I never turn'd my back upon Don or devil yet."
St. 4
The Revenge (1878)

Stuff Happens (album) (1985)

Source: The Impossible

News from Nowhere (1890)
Context: Go back again, now you have seen us, and your outward eyes have learned that in spite of all the infallible maxims of your day there is yet a time of rest in store for the world, when mastery has changed into fellowship — but not before. Go back again, then, and while you live you will see all round you people engaged in making others live lives which are not their own, while they themselves care nothing for their own real lives — men who hate life though they fear death. Go back and be the happier for having seen us, for having added a little hope to your struggle. Go on living while you may, striving, with whatsoever pain and labour needs must be, to build up little by little the new day of fellowship, and rest, and happiness.

Dawkins has stated on many occasions that this passage will be read at his funeral.
Unweaving the Rainbow (1998)
Context: We are going to die, and that makes us the lucky ones. Most people are never going to die because they are never going to be born. The potential people who could have been here in my place but who will in fact never see the light of day outnumber the sand grains of Sahara. Certainly those unborn ghosts include greater poets than Keats, scientists greater than Newton. We know this because the set of possible people allowed by our DNA so massively outnumbers the set of actual people. In the teeth of these stupefying odds it is you and I, in our ordinariness, that are here. We privileged few, who won the lottery of birth against all odds, how dare we whine at our inevitable return to that prior state from which the vast majority have never stirred?

"Last words" — these are not actually Smith's last words, but a section title).
All Trivia: Trivia, More Trivia, Afterthoughts, Last Words (1933)

The Notebooks of Leonardo da Vinci (1883), XX Humorous Writings

On his enemy, King Henry II of England.
Unsourced