It was the work of generations of searchers who took five simple rules to heart.
Question authority. No idea is ture just because someone says so, including me. Think yourself. Question yourself. Don't believe anything just because you want to. Believing something doesn't make it so. Test ideas by the evidence gained from observation and experiment. If a favorite idea fails a well-designed test, it's wrong! Get over it. Follow the evidence, wherever it leads. If you have no evidence, reserve judgment.
And perhaps the most important rule of all, remember you could be wrong. Even the best scientists have been wrong about some things. Newton, Einstein, and every other great scientist in history, they all made mistakes. Of course they did- they were human. Science is a way to keep from fooling ourselves and each other.
Have scientists known sin? Of course.We have misused science, just as we have every other tool at our disposal, and that's why we can't afford to leave it in the hands of a poweful few. The more science belongs to all of us, the less likely it is to be misused. These values undermine the appeals of fanaticism and ignorance and, after all, the universe is mostly dark, dotted by islands of light.
Learning the age of the Earth or the distance to the stars or how life evolves- What difference does that make? Well, part of it depends on how big a universe you are willing to live in. Some of us like it small, that's fine, understandable. But I like it big. And when I take all of this into my heart and my mind, I am uplifted by it. And when I have that feeling, I want to know that it's real. That it's not just smoething happening inside my own head, bacause it matters what's ture, and our imagination is nothing compared with Nature's awesome reality.
I want to know what's in those dark places, and what happened before the Big Bang. I want to know what lies beyond the cosmis horizon, and how life began. Are there other places in the cosmos where matter and enery have become alive and aware? I want to know my ancestors- all of them. I want to be a good, strong link in the chain of generations. I want to protect my children and the children of ages to come.