"From the remotest nebulæ and from the revolving double stars, we have descended to the minutest organisms of animal c…"

"The expression of vanity and self-love becomes less offensive, when it retains something of simplicity and frankness."

"The principal impulse by which I was directed was the earnest endeavor to comprehend the phenomena of physical object…"

"While we maintain the unity of the human species, we at the same time repel the depressing assumption of superior and…"

"One of the noblest characteristics which distinguish modern civilization from that of remoter times is, that it has e…"

"Only what we have wrought into our character during life can we take away with us."

"(In 2019) more than 150 years ago, Alexander von Humboldt warned that “the restless activity of large communities of …"

"Devoted from my earliest youth to the study of nature, feeling with enthusiasm the wild beauties of a country guarded…"

"In order to ameliorate without commotion new institutions must be made, as it were, to rise out of those which the ba…"

"The most powerful influence exercised by the Arabs on general natural physics was that directed to the advances of ch…"