Behind this visible world, there exists an invisible world that drives everything. Without knowing about that invisible world, one cannot live this visible life fully. Only then do births become necessary. But right now, even if you wish to take births, this planet is not ready for it. The consciousness of the Earth is rising beyond the level of your current consciousness. Therefore, you must either evolve or leave this planet. This process has already begun, as you know.
As part of your growth, it is necessary to understand the concept of “dimensions.” A dimension can be described as a field vibrating with a specific frequency. The life you see on Earth right now belongs only to the third dimension. In the third dimension, only matter exists. Since you live in the third dimension, you must learn about the fourth dimension—because the third dimension is entirely governed by the fourth.
The fourth dimension does not appear to you in your waking state, so you cannot recognize it. You exist in the fourth dimension when you are asleep or after death. But since you lack knowledge of that dimension, upon waking you dismiss it all as a “dream.” Similarly, a person who dies without that knowledge continues to live under the illusion that he is still on Earth. Even if he later realizes the fourth dimension, he cannot contact those on Earth. If he appears in someone’s dream to remind them, they forget upon waking.
The fourth dimension is populated by many kinds of beings. Their main purpose is to drain the life energy of humans on Earth, preventing spiritual growth. They push people into addictions, fashions, money, and status, so that they die in ignorance. The root of all difficulties, problems, and illnesses on Earth lies in the fourth dimension.
That is why many higher souls have taken birth on Earth and, through traditions, taught practices to shield you from the influence of the fourth dimension. These include waking up during Brahma Muhurta, bathing three times a day, lighting lamps, cleansing the home and burning incense, and meditating for at least two hours. All these practices are meant to separate you from the fourth dimension. Only then can you live life fully and attain liberation.