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" "[Science] works. It is not perfect. It can be misused. It is only a tool. But it is by far the best tool we have, self-correcting, ongoing, applicable to everything. It has two rules. First: there are no sacred truths; all assumptions must be critically examined; arguments from authority are
worthless. Second: whatever is inconsistent with the facts must be discarded or revised. We must understand the Cosmos as it is and not confuse how it is with how we wish it to be. The obvious is sometimes false; the unexpected is sometimes true.
Carl Edward Sagan (9 November 1934 – 20 December 1996) was an American astronomer, planetary scientist, cosmologist, astrophysicist, astrobiologist, author, and science communicator. His best known scientific contribution is research on extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by radiation. Sagan assembled the first physical messages sent into space, the Pioneer plaque and the Voyager Golden Record, universal messages that could potentially be understood by any extraterrestrial intelligence that might find them. Sagan argued the hypothesis, accepted since, that the high surface temperatures of Venus can be attributed to, and calculated using, the greenhouse effect. He testified to the US Congress in 1985 that the greenhouse effect will change the earth's climate system.
Biography information from Wikiquote
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"Espírito" vem da palavra latina que significa "respirar", O que respiramos é o ar, que é certamente matéria, por mais fina que seja. Apesar do uso em contrário, não há na palavra "espiritual" nenhuma inferência necessária de que estamos falando de algo que não seja matéria (inclusive aquela de que é feito o cérebro), ou de algo que esteja fora do domínio da ciência. De vez em quando, sinto-me livre para empregar a palavra. A ciência não é só compatível com a espiritualidade; é uma profunda fonte de espiritualidade. Quando reconhecemos nosso lugar na imensidão de anos-luz e no transcorrer das eras, quando compreendemos a complexidade, a beleza e a sutileza da vida, então o sentimento sublime, misto de júbilo e humildade, é certamente espiritual. Como também são espirituais as nossas emoções diante da grande arte, música ou literatura, ou de atos de coragem altruísta exemplar como os de Mahatma Gandhi ou Martin Luther King. A noção de que a ciência e a espiritualidade são de alguma maneira mutuamente exclusivas presta um desserviço a ambas.
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