When one studies strongly radioactive substances special precautions must be taken if one wishes to be able to take delicate measurements. The various objects used in a chemical laboratory and those used in a chemical laboratory, and those which serve for experiments in physics, become radioactive in a short time and act upon photographic plates through black paper. Dust, the air of the room, and one's clothes all become radioactive.

Each of us must work for his own improvement, and at the same time share a general responsibility for all humanity.

Life is not easy for any of us. But what of that? We must have perseverance and above all confidence in ourselves.

After all, science is essentially international, and it is only through lack of the historical sense that national qualities have been attributed to it.

I have the best husband one could dream of; I could never have imagined finding one like him. He is a true gift of heaven, and the more we live together the more we love each other.

In science we must be interested in things, not in persons.

It's always good to marry your best friend.