"What parts of the interior or the atmosphere give rise to the various phenomena, or indeed, if these regions have any parts at all, are questions which we ask of the stars in vain."

“The aim of the scientist is to express, in as simple a statement as possible, the principles underlying the order and arrangement of phenomena.”

“It is the event that is the immediate entity of perception; Nature is the sum-total of events, and every instrument of thought that our minds employ can be traced back to its ultimate origin in events.”

“A science in its infancy is the least satisfactory, and, at the same time, the most profitable theme for a general description.”

“It is as though a star throws the whole secret history of its being into its spectrum, and we have only to learn how to read it aright in order to solve the most abstruse problems of the physical Universe.”

“A great idea invariably creates as many problems as it solves: that is a sign of its greatness.”

“Matter, space, and time ... according to the relativist, are types of relations between events.”