“Philosophy is not a system of propositions, and not a science.”
Source: Allgemeine Erkenntnislehre, 1925, p. 157 ; As cited in: Thomas Uebel (2012). Empiricism at the Crossroads: The Vienna Circle's Protocol-Sentence. p. 78
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Moritz Schlick 3
German philosopher 1882–1936Related quotes
Source: Just a Theory: Exploring the Nature of Science (2005), Chapter 3, “Words Scientists Don’t Use: At Least Not the Way You Do” (pp. 51-52)

Logical Atomism (1924)
1920s

“Philosophy is empty if it isn't based on science. Science discovers, philosophy interprets.”
Source: Attributed in posthumous publications, Einstein and the Poet (1983), p. 98

The Philistine http://books.google.com/books?id=AoxHAAAAYAAJ&q="Philosophy+rests+on+a+proposition+that+whatever+is+is+right+preaching+begins+by+assuming+that+whatever+is+is+wrong"&pg=PA130#v=onepage (October 1897).

“Science is a philosophy of discovery. Intelligent design is a philosophy of ignorance.”
Source: Death by Black Hole - And Other Cosmic Quandaries

“To begin with, we put the proposition: pure phenomenology is the science of pure consciousness.”

“Philosophy is the science of estimating values.”
Introduction, p. 4
The Secret Teachings of All Ages (1928)
Context: Philosophy is the science of estimating values. The superiority of any state or substance over another is determined by philosophy. By assigning a position of primary importance to what remains when all that is secondary has been removed, philosophy thus becomes the true index of priority or emphasis in the realm of speculative thought.

Source: Philosophy of Education, p. 86.

“Systems science is what systems scientists do when they claim they do science.”
Facets of Systems Science, (2001)