After the discovery of spectral analysis no one trained in physics could doubt the problem of the atom would be solved when physicists had learned to understand the language of spectra. So manifold was the...

You could give Aristotle a tutorial. And you could thrill him to the core of his being. Aristotle was an encyclopedic polymath, an all time intellect. Yet not only can you know more than him...

On the other side, Church spokesmen could scarcely become enthusiastic about Planck’s deism, which omitted all reference to established religions and had no more doctrinal content than Einstein’s Judaism.

In this field, almost everything is already discovered, and all that remains is to fill a few unimportant holes.{Advising his student, Max Planck, whom he advised in 1878, not to go into physics, at at...

The longing to behold this pre-established harmony [of phenomena and theoretical principles] is the source of the inexhaustible patience and perseverance with which Planck has devoted himself … The state of mind which enables a...