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The first point to remember is that until the advent of science which is only recent nothing could be explained scientifically, but it was all there none-the-less and it wasn't until the microscope that the marvels of nature were revealed and that was only the first layer. Recently we have learned about "multiverse" and I feel there is much more still to be learned?
I think the important thing with children and everyone is to keep an open mind and you will find that Christianity 'hangs together' and provides answers about human nature that science cannot and philosophy can only attempt.
Genesis and modern science are answering different questions. Genesis explains who God is and how he relates to the created world. Science elucidates the God-given laws that explain natural phenomena; and from these laws scientists can work backwards to trace the course of the universe's development. Science makes us aware of the infinite power and wisdom of the Creator, but it cannot explain God's purpose in creating the universe, or his character. Genesis is not dealing with the issues raised by twentieth-century science but with ideas current in the ancient orient over 3000 years ago.
Over against the polytheistic world-view that held there were many gods and goddesses of varying wisdom and power, Genesis declares there is but one God of absolute power and holiness. Rejecting the ancient view that mankind was simply created as an afterthought which the gods later regretted; Genesis affirms that man was the goal of creation and that his welfare is God's supreme concern. These principles are reaffirmed repeatedly throughout Scripture, but they are set out with exemplary clarity in Genesis 1 and are central to what the author was trying to say. Modern readers should concentrate on these original intentions of Genesis and not bring to the text scientific issues which are foreign to its purpose.
As I see it we have various subjects like science and the arts, maths, literature etc that are all complimentary and Christianity sits alongside these and I feel it needs to be taught if only so that some of the errors can be got rid of, but more importantly it adds another dimension to our lives and helps us become more rounded people imo, and more understanding as well.
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