"The very nature of the quantum theory ... forces us to regard the space-time coordination and the claim of causality, the union of which characterizes the classical theories, as complementary but exclusive features of the description, symbolizing the idealization of observation and description, respectively."
— Niels Bohr

"Quantum physics is to regular everyday physics as a David Lynch film is to a mainstream blockbuster"
— S Peter Davis

"Not only is the Universe stranger than we think, it is stranger than we can think."
— Werner Heisenberg (Across the Frontiers)

"...quantum mechanics—the physics of our world—requires that you hold such pedestrian complaints in abeyance."
— Brian Greene (The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory)

"Those who are not shocked when the first come across quantum theory cannot possibly have understood it."
— Niels Bohr (Volume II - Essays 1932-1957 on Atomic Physics and Human Knowledge)

"Know the world from end to end is a mirror;
in each atom a hundred suns are concealed.
If you pierce the heart of a single drop of water,
from it will flow a hundred clear oceans;
if you look intently at each speck of dust,
in it you will see a thousand beings.
A gnat in its limbs is like an elephant;
in name a drop of water resembles the Nile.
In the heart of a barleycorn is stored a hundred harvests.
Within a millet-seed a world exists.
In an insects wing is an ocean of life.
A heaven is concealed in the pupil of an eye.
The core at the center of the heart is small,
yet the Lord of both worlds will enter there."
— Mahmud Shabistari

"There is no number,
for counting cuts like the blade edge,
nor is there time since limit
is a timekeeper's idolatry"
— Umar Ibn al-Farid

"Listen, O lord of the meeting rivers,
things standing shall fall,
but the moving ever shall stay."
— Basava (The lord of the meeting rivers: Devotional poems of Basavanna)