Condemnation without investigation is the height of ignorance

Formerly, people thought that if matter disappeared from the universe, space and time would remain. Relativity declares that space and time would disappear with matter.

... we will hope that future historians will explain the morbid symptoms of present-day society as the childhood ailments of an aspiring humanity, due entirely to the excessive speed at which civilization was advancing.

Regarding sex education: no secrets!

If you want to make your children brilliant, tell them fairy tales. If you want to make them more brilliant, tell them more fairy tales.

By academic freedom I understand the right to search for truth and to publish and teach what one holds to be true. This right also implies a duty: one must not conceal any part of what one has recognized to be true.

In theory, theory and practice are the same. In practice, they are not.