We should be learning to look at the things that cannot be seen, and training ourselves no to look so much at the things that can be seen. We are a part of two different worlds. We are a part of this physical, natural , and temporal world. The natural world can be seen and experienced with our natural senses. However, as Christians, we are also a part of a spiritual, supernatural, and eternal world. This spiritual world is just as real, but cannot be seen with our natural human eyes. But we serve a God that is all-knowing, nothing is hidden from Him.