“Science, like art, religion, commerce, warfare, and even sleep, is based on presuppositions.”— Gregory Bateson
“I don't believe that the Earth's but about 9,000 years old. I believe it was created in six days as we know them.”— Paul Broun
“For me, the romance of science is not in the certainty of the answer, but in the burning, restless curiosity that drives the question.”— Ann Druyan
“Part of the bargain of being a scientist is that you're not supposed to have an emotional attachment to your theories.”— Hal Abelson
“Science is a system of statements based on direct experience, and controlled by experimental verification.”— Rudolf Carnap
“Natural selection is not the wind which propels the vessel, but the rudder which, by friction, now on this side and now on that, shapes the course.”— Asa Gray
“I confidently expect that in the future we shall have less debate about the derivation of species, and more observation.”— Asa Gray
“Scientific knowledge is in perpetual evolution; it finds itself changed from one day to the next.”— Jean Piaget
“We have to learn again that science without contact with experiments is an enterprise which is likely to go completely astray into imaginary conjecture.”— Hannes Alfvén
“Personally, I think there is not a scrap of evidence that the process of isotopic separation can be made to produce explosive bombs.”— Francis William Aston
“The transfer of allegiance from paradigm to paradigm is a conversion experience that cannot be forced.”— Thomas Kuhn
“Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less.”— Marie Curie