That Mars is inhabited by beings of some sort or other we may consider as certain as it is uncertain what these beings may be.
More from Percival Lowell
Formulae are the anaethetics of thought, not its stimulants.
Permalink to quote #3 War is a survival among us from savage times and affects now chiefly the the boyish and unthinking element of the nation.
Permalink to quote #5 The whole object of science is to synthesize, and so simplify; and did we but know the uttermost of a subject we could make it singularly clear.
Permalink to quote #2