Be less curious about people and more curious about ideas.

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

Stability can only be attained by inactive matter.

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

You cannot hope to build a better world without improving the individuals.

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

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