Speculation has been singularly fruitful as to what these markings on our next to nearest neighbor in space may mean. Each astronomer holds a different pet theory on the subject, and pooh-poohs those of all the others. Nevertheless, the most self-evident explanation from the markings themselves is probably the true one; namely, that in them we are looking upon the result of the work of some sort of intelligent beings. . . . The amazing blue network on Mars hints that one planet besides our own is actually inhabited now.
Percival LowellFormulae are the anaesthetics of thought, not its stimulants and to make any one think is far better worth while than cramming him with ill-considered, and therefore indigestible, learning.
Percival LowellImagination is as vital to any advance in science as learning and precision are essential for starting points.
Percival LowellThat Mars is inhabited by beings of some sort or other we may consider as certain as it is uncertain what these beings may be.
Percival Lowell