"I always strive to maintain freedom of thought. I can give up any hypothesis, no matter how much I love it, as long as facts prove it incorrect." — Darwin (UK)
"A thinking person, once freed from the dazzling influence of traditional prejudices, will find the best evidence of humanity's great capacities in our lower ancestors, and from the long evolution of human history, will find the confidence and rational basis for reaching a more sublime future." — Huxley (UK)
"Deep thoughts are like nails; once driven into the mind, nothing can pull them out." — Diderot (France)
"We rarely think for the present. Even when we do, we think only to handle the future, occasionally finding some guiding light from the present. The present is by no means our goal; the past and the present are merely means, whereas only the future is the goal." — Pasteur (France)
"Fantasy is the wings of the poet; hypothesis is the ladder of science." — Goethe (Germany)
"The development of our thoughts often stems, in some sense, from curiosity." — Einstein (USA)
"Without creative individuals capable of independent thought and judgment, the upward development of society is unimaginable." — Einstein (USA)
"The development of the world of thought is, in a sense, a constant shedding of wonder." — Einstein (USA)
"Imagination is more important than knowledge. For knowledge is limited, while imagination embraces the whole world, drives progress, and is the source of the evolution of knowledge. Seriously speaking, imagination is a real factor in scientific research." — Einstein (USA)
"Asking a question is often more important than solving one, for solving a problem might just be a teaching or experimental skill. On the other hand, proposing new questions, new possibilities, and looking at old problems from new perspectives requires creative imagination, and it marks true scientific progress." — Einstein (USA)
"A soul without imagination is like an observatory without a telescope." — Einstein (USA)
"To learn knowledge, one must be good at thinking, thinking, and thinking again. I became a scientist through this method." — Einstein (USA)
"Thought is forever the ruler of the universe." — Plato (Greece)
"To make true and correct judgments, one must free their thoughts from the shackles of prejudice and fanaticism." — Lomonosov (Russia)
"In a creator's career, every step must be taken with deep thought rather than blind experimentation." — Michelin (Soviet Union)
"Philosophy is the friend of reason and science, whereas theology is the enemy of reason and the protector of ignorance." — Diderot (France)
"The most beautiful thing we can experience is the mysterious; it is the source of all true art and science." — Einstein (USA)
"Spreading knowledge is sowing happiness. The progress and expanding fields of scientific research will evoke hope, and the bacteria existing in the human body and mind will gradually disappear." — Nobel (Sweden)