A categorical imperative would be one which represented an action as objectively necessary in itself, without reference to any other purpose.

In a time not distant, it will be possible to flash any image formed in thought on a screen and render it visible at any place desired. The perfection of this means of reading thought will create a revolution for the better in all our social relations.

Manifest plainness, embrace simplicity, reduce selfishness, have few desires.

How far you can go without destroying from within what you are trying to defend from without?

The philosopher has never killed any priests, whereas the priest has killed a great many philosophers.