There are three levels of soul that we can learn to achieve throughout life. We are born into this world with the lowest level of soul. The next two higher levels are attained by way of spiritual accomplishments that we achieve in the course of life.
Left to his own devices, man would remain enslaved to the primal urges and impulses of the body, the lowest level of soul. Therefore, the energy of this passage infuses us with the strength to help us climb towards the next level of soul.