I can only guess why your neighbor has become so deeply involved in occult practices and mystical beliefs—but at least part of the reason (I suspect) is because she has a deep spiritual emptiness in her soul, and she hopes these will fill that empty place.
And at the moment she may think her spiritual hunger is being satisfied. But in reality it is not—as she will eventually discover. In our frantic search for happiness and peace, we seek all kinds of ways to fill the empty place in our souls—possessions, entertainment, sex, drugs and alcohol, relationships, even the occult. For a time these may seem to satisfy our inner spiritual hunger—but eventually they all fail. We are like those of whom the Bible speaks: “a hungry person dreams of eating, but awakens hungry still” (Isaiah 29:8).
Why is this? The reason is because God put that empty place in our souls, and only He can truly fill it. And He will, as we turn to Him and receive Jesus Christ into our hearts. He alone has the power to forgive us and cleanse us, and He alone has the right to make us His sons and daughters. Have you put your life into His hands?
Pray for your neighbor, that God will break through her resistance and pride and open her heart and mind to Jesus Christ. Ask Him also to help you be an example to her of Christ’s love and truth. In Him alone we have the “knowledge of the truth” (Titus 1:1).