Science can't tell anybody anything. It is a sort of process of elimination and what is left is the truth. No message.

Science is the advancement of knowledge, as we learn we change. There are still a lot of unanswered questions out there and theories abound, but they are only theories. When I first began to read about the universe the books all said the universe was forever with no boundaries which at the time seemed impossible to me. I couldn't grasp the concept of forever and it seemed to be an impossibility to me. Now we know the universe is expanding. Theories will be changed and modified all for the sake of knowledge, I hope.

If you really take Einstein's statement at face value, he's simply saying that science, for all its warts, is the best shot we have at approximating an accurate view of reality. Science is simply the work product of the scientific method, which is a methodology for minimizing / compensating for the known weaknesses in human thinking. It is an attempt to avoid confirmation bias, as much as anything. As well as commitment bias -- science self-corrects when new info or understanding justify it. Theists frequently try to flip that, and say, "ah ha, see science changes its mind, it's not reliable". But this is a feature, not a bug.

A lot of the popular science press gives science a bad name by conflating association with cause. Some new association that's found makes for good headlines and effective click-bait. But it shouldn't be written up as if anything is actually proven by it. This is the source of comedy like the Onion headline, "FDA says eggs are OK for you to eat until next Tuesday".

Skepticism, rationalism, empiricism and the scientific method are indeed the most precious thing we have. Will it be enough to ensure the survival of our species in the end? I don't know, but I certainly don't think the failed epistemology of religious faith is going to do it.