The short string of words wasn't some silly poem, they represented six divine powers!
Divine powers weren't like ordinary spells, they made use of nomological laws and the powers that governed the universe. That was why only powerful cultivators could harness the power of divine powers. In addition, that was also why every divine power passed down the generations was so powerful.
It should have been impossible for Wang Baole to grasp or master the six divine powers through the remnant Divine Sense. This was similar to what he had experienced in the Dark Dream. He had read up on many spells and several divine powers. However, his level of cultivation then had prevented him from mastering them. That had been his greatest limitation.