Everyone only hears what he understands.

Superstition is rooted in a much deeper and more sensitive layer of the psyche than skepticism.

I could never have known so well how paltry men are, and how little they care for really high aims, if I had not tested them by my scientific researches. Thus I saw that most men only care for science so far as they get a living by it, and that they worship even error when it affords them a subsistence.

Passions are vices or virtues to their highest powers.

There are men who never err, because they never propose anything rational.

Basic characteristics of an individual organism: to divide, to unite, to merge into the universal, to abide in the particular, to transform itself, to define itself, and as living things tend to appear under a thousand conditions, to arise and vanish, to solidify and melt, to freeze and flow, to expand and contract. Since these effects occur together, any or all may occur at the same moment.

I am proud of my heart alone, it is the sole source of everything, all our strenght, happiness & misery. All the knowledge I possess everyone else can acquire, but my heart is all my own