In good philosophy, the word cause ought to be reserved to the single Divine impulse that has formed the universe.

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

How do you know that the incessant progress of science will not compel scientists to consider that life has existed during eternity, and not matter?

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.

Posterity will one day laugh at the foolishness of modern materialistic philosophers.

The universe is asymmetric and I am persuaded that life, as it is known to us, is a direct result of the asymmetry of the universe or of its indirect consequences. The universe is asymmetric.

There are two men in each one of us: the scientist, he who starts with a clear field and desires to rise to the knowledge of Nature through observations, experimentation and reasoning, and the man of sentiment, the man of belief, the man who mourns his dead children, and who cannot, alas, prove that he will see them again, but who believes that he will, and lives in the hope – the man who will not die like a vibrio, but who feels that the force that is within him cannot die.