He knew well that he had it!
Something deep within his soul that would have greatly awed the former him
to the core: A literally thousands of stars within his soul that have yet to grow. Was he stupid to have exchanged everything he possessed, how much he had desperately wanted his thousands of genes back, all so that he could become an embodiment of the All?
Yes! He probably was.
But what facilitated him going for it and paying such a steep price was that truly to Zeras, it was a worthy exchange.
The power of the body to contain millions of stars, thousands of galaxies, and an entire plane of cosmos within a singular body!
As much as he believed that his potential was unrivaled, Zeras knew he would never reach a stage where he would be able to harness literal planes of existence within his body. Before such a thing, his thousands of genes and abilities seemed so mundane, that they were almost not even worth mentioning at all.