"The world is full of wonders, and science is the key to unlocking them."

"A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with …"

"The whole development of science is nothing but a continuous struggle to escape from the magic of the senses."

"When you change your opinion, you are not a weakling. You are a scientist."

"I started from the assumption that the energy of an oscillator is quantized. I did this in an act of desperation."