Lack of understanding is a great power. Sometimes it enables men to conquer the world.
The Arab who built himself a hut with marbles from the temple of Palmyra is more philosophical than all the curators of the museums of London, Paris, and Munich.
It is good to collect things, but it is better to go on walks.
The wonder is, not that the field of stars is so vast, but that man has measured it.
A good critic is the man who describes his adventures among masterpieces.