It was like a new world opened to me, the world of science, which I was at last permitted to know in all liberty.

Certein bodies... become luminous when heated. Their luminosity disappears after some time, but the capacity of becoming luminous afresh through heat is restored to them by the action of a spark, and also by the action of radium.

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

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.

More and more, I feel the need for a house and a garden.

The older one gets, the more one feels that the present must be enjoyed; it is a precious gift, comparable to a state of grace

We must have perseverance and above all confidence in ourselves.