“God created both us and our world in such a way that there is a certain fit or match between the world and our cognitive faculties. The medievals had a phrase for it: adequatio intellectus ad rem (the adequation of the intellect to reality).”

“The basic structure of the world is due to a creative intelligence: a person, who aimed and intended that the world manifest a certain character. The world was created in such a way that it displays order and regularity.”

“Regularity and lawlikeness obviously fit well with the thought that God is a rational person who has created our world, and instituted the laws of nature.”

“God is not obliged, by his nature or anything else, to create the world. [...] Instead, creation is a free action on his part. [...] That he has created a world outside of himself at all, and that the world he has created displays the particular character and laws it does display - these are contingent matters.”

“This natural knowledge of God is not arrived at by inference or argument [...] but in a much more immediate way. [...] Upon the perception of the night sky or the mountain vista or the tiny flower these beliefs just arise within us. They arise in these circumstances; they are not conclusions from them.”

“Our cognitive faculties have been designed and created by God; the design plan [...] has been developed and instituted by a conscious, intelligent agent. The purpose of the sensus divinitatis is to enable us to have true beliefs about God.”

“There are some very good arguments for theistic belief [...] nevertheless, these arguments are not strong enough to support the conviction with which serious believers in God do in fact accept theistic belief.” / “Scripture is most importantly a message, a communication from God to humankind; Scripture is a word from the Lord.”

“The way in which knowledge progresses, and especially our scientific knowledge, is by unjustified (and unjustifiable) anticipations, by guesses, by tentative solutions to our problems, by conjectures. These conjectures are controlled by criticism; that is, by attempted refutations, which include severely critical tests.”

“It is easy to obtain confirmations, or verifications, for nearly every theory—if we look for confirmations. Confirmations should count only if they are the result of risky predictions; that is to say, if, unenlightened by the theory in question, we should have expected an event which was incompatible with the theory—an event which would have refuted the theory.”

“Some genuinely testable theories, when found to be false, are still upheld by their admirers—for example by introducing ad hoc some auxiliary assumption, or by re-interpreting the theory ad hoc in such a way that it escapes refutation. Such a procedure is always possible, but it rescues the theory from refutation only at the price of destroying, or at least lowering, its scientific status.”

“Thus science must begin with myths, and with the criticism of myths; neither with the collection of observations, nor with the invention of experiments, but with the critical discussion of myths, and of magical techniques and practices.”

“We are not students of some subject matter but students of problems. And problems may cut right across the border of any subject matter or discipline.”

“Theories are our own inventions, our own ideas; they are not forced upon us, but are our self-made instruments of thought: this has been clearly seen by the idealist. But some of these theories of ours can clash with reality; and when they do, we know that there is a reality; that there is something to remind us of the fact that our ideas may be mistaken.”

“The history of science, like the history of all human ideas, is a history of irresponsible dreams, of obstinacy, and of error. But science is one of the very few human activities—perhaps the only one—in which errors are systematically criticized and fairly often, in time, corrected.”

“[T]he rationality of science lies not in its habit of appealing to empirical evidence in support of its dogmas—astrologers do so too—but solely in the critical approach—in an attitude which, of course, involves the critical use, among other arguments, of empirical evidence (especially in refutations).”

“Thanks to Tarski's work, the idea of objective or absolute truth—that is truth as correspondence with the facts—appears to be accepted today with confidence by all who understand it.”