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"Similar to energy, the soul is invisible. An infinite number of souls exist in the universe. In its pure form (a soul without attached karma particles), each soul possesses infinite knowledge, infinite perception, infinite energy and power, and unobstructed bliss." (from a Jain Sutra)
I believe when we see sets of numbers (like 111, 222, 333, 444, etc.) it is a sign from our spirit guides or angels letting us know they are here, watching over us. It is recommended to take note of what you are thinking about at the time you see a particular set of numbers, especially if you notice them repeatedly.