The nights seem to me too long... I am often scolded by Madame Pasteur, but I tell her I shall lead her to fame.

Every chemical substance, whether natural or artificial, falls into one of two major categories, according to the spatial characteristic of its form. The distinction is between those substances that have a plane of symmetry and those that do not. The former belong to the mineral, the latter to the living world.

These are the living springs of great thoughts and great actions. Everything grows clear in the reflections from the Infinite.

The flavor of wine is like delicate poetry.

When I approach a child, he inspires in me two sentiments; tenderness for what he is, and respect for what he may become.

Whatever your career may be, do not let yourselves become tainted by a deprecating and barren scepticism.

La fortuna juega a favor de una mente preparada