Sakyamuni Buddha spoke of himself saying “I.” After Sakyamuni Buddha realized Buddhahood, he certified to the Eight Great Independent Aspects of “I”:

1. He could manifest one body as many bodies.
2. He could display one body the size of a mote of dust which filled three thousand great thousand world systems.
3. He had a great body which could float and travel long distances.
4. He could manifest in limitless ways while constantly residing in one land. “Limitless ways” include in the body of a Buddha, of a Bodhisattva, a Sound-Hearer, One Enlightened to Conditions, a god, a man, an asura, a ghost, an animal, and so forth.
5. He had the mutual functioning of all sense faculties. It may sound strange to people who have never heard sutras before that the eyes can eat, the ears can see, the nose can speak, and the mouth can hear and see as well as eat. However, it is possible for the six faculties of eyes, ears, nose, tongue, body, and mind to function mutually so that each has the abilities of all the others.
6. He fathomed the dharma without the thought of dharma.
7. He could speak the meaning of one gāthā for limitless kalpas.
8. He had a body which could pervade all places like empty space.