“The love that moves the sun and the other stars.”

Canto XXXIII, closing lines, as translated by Henry Wadsworth Longfellow
The Divine Comedy (c. 1308–1321), Paradiso
Context: As the geometrician, who endeavours
To square the circle, and discovers not,
By taking thought, the principle he wants,Even such was I at that new apparition;
I wished to see how the image to the circle
Conformed itself, and how it there finds place;But my own wings were not enough for this,
Had it not been that then my mind there smote
A flash of lightning, wherein came its wish. Here vigour failed the lofty fantasy:
But now was turning my desire and will,
Even as a wheel that equally is moved, The Love which moves the sun and the other stars.

Variant: Doubt thou the stars are fire
Doubt thou the sun doth move
Doubt truth to be a liar
But never doubt I love
Source: Hamlet

"Bedouin Song" (1853), in The Poetical Works of Bayard Taylor (1907), p. 69.
Source: The Poems of Bayard Taylor
Context: I love thee, I love but thee,
With a love that shall not die
Till the sun grows cold,
And the stars are old,
And the leaves of the Judgment Book unfold!
Context: From the Desert I come to thee
On a stallion shod with fire;
And the winds are left behind
In the speed of my desire.
Under thy window I stand,
And the midnight hears my cry:
I love thee, I love but thee,
With a love that shall not die
Till the sun grows cold,
And the stars are old,
And the leaves of the Judgment Book unfold!

Let an observer B on the star estimate the distance and epoch of the nova outburst to be x<nowiki>'</nowiki> units of length and t<nowiki>'</nowiki> units of time, respectively. Then the Lorentz formulae, relating x<nowiki>'</nowiki> to t<nowiki>'</nowiki>, are<center><math>x' = \frac {x-vt}{\sqrt{1-\frac{v^2}{c^2}}} ; \qquad t' = \frac {t-\frac{vx}{c^2}}{\sqrt{1-\frac{v^2}{c^2}}}</math></center>
These formulae are... quite general, applying to any event in line with two uniformly moving observers. If we let c become infinite then the ratio of v to c tends to zero and the formulae become<center><math>x' = x - vt ; \qquad t' = t</math></center>.
The Structure of the Universe: An Introduction to Cosmology (1949)

Poems and Ballads (1866-89), The Triumph of Time
Context: p>We had stood as the sure stars stand, and moved
As the moon moves, loving the world; and seen
Grief collapse as a thing disproved,
Death consume as a thing unclean.
Twain halves of a perfect heart, made fast
Soul to soul while the years fell past;
Had you loved me once, as you have not loved;
Had the chance been with us that has not been.I have put my days and dreams out of mind,
Days that are over, dreams that are done.
Though we seek life through, we shall surely find
There is none of them clear to us now, not one.</p

Source: Fahrenheit 451

Source: The House of Hades