If it takes a hundred years, it will be a pity, but I will not cease to work for it as long as I live.

First principle: never to let one's self be beaten down by persons or by events.

The sensitive plate, the gas which is ionised, the fluorescent screen, are in reality receivers, into another kind of energy, chemical energy, ionic energy... luminous energy.

We must not forget that when radium was discovered no one knew that it would prove useful in hospitals.

There are sadistic scientists who hurry to hunt down errors instead of establishing the truth.

We must not forget that when radium was discovered no one knew that it would prove useful in hospitals. The work was one of pure science. And this is a proof that scientific work must not be considered from the point of view of the direct usefulness of it. It must be done for itself, for the beauty of science, and then there is always the chance that a scientific discovery may become like the radium a benefit for humanity.

Nothing in this world is to be feared... only understood.