The law of nature instructs most animals to cherish and educate their infant progeny. The law of reason inculcates to the human species the returns of filial piety.

The Germans, in the age of Tacitus, were unacquainted with the use of letters; and the use of letters is the principal circumstance that distinguishes a civilised people from a herd of savages incapable of knowledge or reflection. Without that artificial help, the human memory soon dissipates or corrupts the ideas intrusted to her charge; and the nobler faculties of the mind, no longer supplied with models or with materials, gradually forget their powers; the judgment becomes feeble and lethargic, the imagination languid or irregular.

In this primitive and abject state [of hunters and gatherers], which ill deserves the name of society, the human brute, without arts or laws, almost without sense or language, is poorly distinguished from the rest of the animal creation.

The Gauls were endowed with all the advantages of art and nature; but as they wanted courage to defend them, they were justly condemned to obey, and even to flatter, the victorious Barbarians, by whose clemency they held their precarious fortunes and their lives.

There are two very natural propensities which we may distinguish in the most virtuous and liberal dispositions, the love of pleasure and the love of action. If the former is refined by art and learning, improved by the charms of social intercourse, and corrected by a just regard to economy, to health, and to reputation, it is productive of the greatest part of the happiness of private life.

Instructed by history and reflection, Julian was persuaded that, if the diseases of the body may sometimes be cured by salutary violence, neither steel nor fire can eradicate the erroneous opinions of the mind.

Philosophy, with the aid of experience, has at length banished the study of alchymy; and the present age, however desirous of riches, is content to seek them by the humbler means of commerce and industry.