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" I believe that the universe was formed around 15 billion years ago and that humans have evolved from their apelike ancestors over the past few million years. I believe we are more likely to live a good life if all humans try to work together in a world community, preserving planet earth. When decisions for groups are made in this world, I believe that the democratic process should be used. To protect the individual, I believe in freedom of speech, freedom of the press, freedom of religion, freedom from religion, freedom of inquiry, and a wall of separation between church and state. When making decisions about what is right or wrong, I believe I should use my intelligence to reason about the likely consequences of my actions. I believe that I should try to increase the happiness of everyone by caring for other people and finding ways to cooperate. Never should my actions discriminate against people simply because of their race, religion, sex, sexual orientation, age, or national origin. I believe that ideas about what is right and wrong will change with education, so I am prepared to continually question ideas using evidence from experience and science. I believe there is no valid evidence to support claims for the existence of supernatural entities and deities. I will use these beliefs to guide my thinking and my actions until I find good reasons for revising them or replacing them with other beliefs that are more valid. "
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" Thus, by science I mean, first of all, a worldview giving primacy to reason and observation and a methodology aimed at acquiring accurate knowledge of the natural and social world. This methodology is characterized, above all else, by the critical spirit: namely, the commitment to the incessant testing of assertions through observations and/or experiments — the more stringent the tests, the better — and to revising or discarding those theories that fail the test. One corollary of the critical spirit is fallibilism: namely, the understanding that all our empirical knowledge is tentative, incomplete and open to revision in the light of new evidence or cogent new arguments (though, of course, the most well-established aspects of scientific knowledge are unlikely to be discarded entirely).
. . . I stress that my use of the term 'science' is not limited to the natural sciences, but includes investigations aimed at acquiring accurate knowledge of factual matters relating to any aspect of the world by using rational empirical methods analogous to those employed in the natural sciences. (Please note the limitation to questions of fact. I intentionally exclude from my purview questions of ethics, aesthetics, ultimate purpose, and so forth.) Thus, 'science' (as I use the term) is routinely practiced not only by physicists, chemists and biologists, but also by historians, detectives, plumbers and indeed all human beings in (some aspects of) our daily lives. (Of course, the fact that we all practice science from time to time does not mean that we all practice it equally well, or that we practice it equally well in all areas of our lives.) "
― Alan Sokal