"Loop Quantum Gravity," The New Humanists: Science at the Edge (2003)
“Every instrument that has been designed to be sensitive enough to detect weak light has always ended up discovering that the same thing: light is made of particles.”
Source: QED: The Strange Theory of Light and Matter (1985), p. 15
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Richard Feynman 181
American theoretical physicist 1918–1988Related quotes

The Manual of the Warrior of Light (1997)
Context: Every Warrior of the Light has suffered for the most trivial of reasons. Every Warrior of the Light has, at least once, believed he was not a Warrior of the Light.
Every Warrior of the Light has failed in his spiritual duties.
Every Warrior of the Light has said "yes" when he wanted to say "no."
Every Warrior of the Light has hurt someone he loved.
That is why he is a Warrior of the Light, because he has been through all this and yet has never lost hope of being better than he is.
Each stone, each bend cries welcome to him. He identifies with the mountains and the streams, he sees something of his own soul in the plants and the animals and the birds of the field.
Then, accepting the help of God and of God's signs, he allows his personal legend to guide him toward the tasks that life has reserved for him.
On some nights, he has nowhere to sleep, on others he suffers from insomnia. "That's just how it is," thinks the warrior. "I was the one who chose to walk this path."
In these words lies all his power: He chose the path along which he is walking and so has no complaints.
Essay on Atomism: From Democritus to 1960 (1961), p.6

from The Lord's Prayer.
Context: The excellence of a thing is the end for which it was made; as of a star to give light, and of a plant to be fruitful. So the excellence of a Christian is to answer the end of his creation, which is to hallow God’s name, and live to that God by whom he lives.
Social Law in the Spiritual World (1904)
Context: No person can ever hope to gain an adequate idea of the religious movement which has been called by the name of Quakerism until he has discovered what is meant by the "Inner Light." It is the root principle of an important historic faith, and it deserves a careful examination.
The term "Inner Light" is older than Quakerism, and the idea which is thus named was not new when George Fox began to preach it. But this idea received a meaning and an emphasis from the Quakers which make it their own peculiar principle and their distinct contribution to religious thought.