Both light and shadow

Both light and shadow are the dance of Love. Love has no cause, it is the astrolabe of God’s secrets. Lover and loving are inseparable and timeless. Although I may try to describe love, when I experience it, I am speechless. Although I may try to write about love, I am rendered helpless. My pen breaks, and the paper slips away at the ineffable place where lover loving and loved are one. Every moment is made glorious by the light of Love.
Rumi

From what has been

From what has been said it is also evident, that the Whiteness of the Sun’s Light is compounded all the Colours wherewith the several sorts of Rays whereof that Light consists, when by their several Refrangibilities they are separated from one another, do tinge Paper or any other white Body whereon they fall. For those Colours … are unchangeable, and whenever all those Rays with those their Colours are mix’d again, they reproduce the same white Light as before.
Isaac Newton

But of all other

But of all other stupendous inventions, what sublimity of mind must have been his who conceived how to communicate his most secret thoughts to any other person, though very far distant either in time or place? And with no greater difficulty than the various arrangement of two dozen little signs upon paper? Let this be the seal of all the admirable inventions of man.
Galileo Galilei