Rene Stein

“To make matters even worse, Schlick had the cheek to write an essay called “The Meaning of Life.” He even gave a simple answer to the question. The meaning of life does not reside in a higher purpose, but can be expressed in just one word, said Moritz Schlick: “The meaning of life is youth.”
― Karl Sigmund, Exact Thinking in Demented Times: The Vienna Circle and the Epic Quest for the Foundations of Science

“This term serves to contrast our worldview with philosophy in its usual sense, as a doctrine about the world that claims to stand side by side with the scientific disciplines, or possibly even above them. In our opinion, anything that can be sensibly said at all is a proposition of science, and doing philosophy just means examining critically the propositions of science to check whether they are or are not pseudo-propositions (that is, whether they really have the clarity and significance ascribed to them by the practitioners of the science in question); and it means, further, exposing as pseudo-propositions those propositions that lay claim to another type, and a higher degree, of significance than the propositions of science.”
― Karl Sigmund, Exact Thinking in Demented Times: The Vienna Circle and the Epic Quest for the Foundations of Science

“The piecemeal reformer will seek to address the most urgent evils of society instead of aiming to achieve the greatest ultimate good, and this may look like a verbal quibble but Popper argued that it is the difference between a reasonable method of improving the lot of man, and a method which may easily lead to an intolerable increase in human suffering.
The case for utopian engineering runs like this: to act rationally we need to have an aim (an end), and then actions can be classified as rational if they are consistent with that end. By this logic, political actions are rational if they pursue the final end that has been set for the reform of the state. In that way, actions are driven by our ultimate political ends.”
― Rafe Champion, Popper: The Champion Guides

“and”
― Karl Sigmund, Exact Thinking in Demented Times: The Vienna Circle and the Epic Quest for the Foundations of Science