Cautiousness in judgment is nowadays to be recommended to each and every one: if we gained only one incontestable truth every ten years from each of our philosophical writers the harvest we reaped would be sufficient.

The course of the seasons is a piece of clockwork, with a cuckoo to call when it is spring.

Of all the inventions of man I doubt whether any was more easily accomplished than that of a Heaven.

There are people who think that everything one does with a serious face is sensible.

Above all things expand the frontiers of science: without this the rest counts for nothing.

Libraries can in general be too narrow or too wide for the soul.

There exists a species of transcendental ventriloquism by means of which men can be made to believe that something said on earth comes from Heaven.