"The scientist's most important tool is his imagination."

"The atom is a tiny planetary system. The electrons revolve around the nucleus just as the planets revolve around the sun."

"The meaning of our words is always context-dependent."

"The aim of atomic physics is to understand the world in which we live, and we are ourselves a part of this world."

"I often say that there is no quantum world. There is only an abstract quantum physical description. It is wrong to think that the task of physics is to find out how nature is. Physics concerns what we…"