The universe is not required to be in perfect harmony with human ambition.

—Carl Sagan

About Carl Sagan

Portrait of Carl Sagan

Carl Edward Sagan (; SAY-gən; November 9, 1934 – December 20, 1996) was an American astronomer, planetary scientist and science communicator. Initially an assistant professor at Harvard, Sagan later moved to Cornell, where he was the David Duncan Professor of Astronomy and Space Sciences and directed the Laboratory for Planetary...

More quotations from Carl Sagan

In science it often happens that scientists say, "You know, that's a really good argument; my position is mistaken," and then they actually change their minds, and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.

—Carl Sagan

There is no other species on the Earth that does science. It is, so far, entirely a human invention, evolved by natural selection in the cerebral cortex for one simple reason: it 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.

—Carl Sagan in Cosmos

More quotations tagged with “ambition”

While I was young, when I burned with the love of God, I thought I would convert the whole world to God. But soon I realized that it would be more than enough to convert the people who lived in my town, and I made an effort for a long time, but was not successful. Then I realized that my agenda was still too ambitious, and I focused on the people in my household. But I could not convert them either. Finally I realized: I must work on myself, if I'm really going to have something to offer God. But I didn't even accomplish this.

—Rabbi Chaim Halberstam of Sanz

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