The proposition ‘I only believe in what can be observed empirically, or what can be inferred from what is empirically observed’ cannot itself be derived from empirical observation!
— Greg Bahnsen, quoted in Without a Doubt by Kenneth Richard Samples, kindle location 320
The term “scientism” describes the view that science is the only reliable method of knowing truth about the world. Accordingly, “Everything outside of science is a matter of mere belief and subjective opinion,” says J. P. Moreland, “of which rational assessment is impossible.”
— Greg Koukl, from Tactics, kindle location 2112
Scientism, though, comes in two basic flavors. The strong version of scientism declares that only science can give us knowledge. The weak version sees science as the best path to knowledge. Scientism tends to assume that (a) nature is all the reality there is and (b) science is the (only) means of obtaining knowledge.
— Paul Copan, from Loving Wisdom, kindle location 1604
What is more, the fact that there are scientists who appear to be at war with God is not quite the same thing as science itself being at war with God. For example, some musicians are militant atheists. But does that mean music itself is at war with God? Hardly. The point here may be expressed as follows: Statements by scientists are not necessarily statements of science. Nor, we might add, are such statements necessarily true; although the prestige of science is such that they are often taken to be so.
— John Lennox, from God’s Undertaker: Has Science Buried God?, kindle location 213
Whatever knowledge is attainable must be obtained by scientific methods, and what science cannot discover mankind cannot know.
— Bertrand Russell, quoted in God’s Undertaker: Has Science Buried God?, at 27:45
Scientism: Unlike the use of the scientific method as only one mode of reaching knowledge, scientism claims that science alone can render truth about the world and reality. Scientism’s single-minded adherence to only the empirical, or testable, makes it a strictly scientific worldview…. Scientism sees it necessary to do away with most, if not all, metaphysical, philosophical, and religious claims, as the truths they proclaim cannot be apprehended by the scientific method. In essence, scientism sees science as the absolute and only justifiable access to the truth.
— Defined by pbs.org/faithandreason/gengloss/sciism-body.html