Sauron was a mair. Mair have no distint, visible forms. before he had forged the ring, he could change his shape. but when he put it on however, his true identity was clear to all. So the ring made him visible to us. but it made everyone else, since they were not sauron invisible
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As you go the way of life, you will see a great chasm. Jump. It is not as wide as you think
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