There are three levels to the human soul, Nefesh [lowest level], Ruach [Middle level], and Neshamah [Highest level of the three]. There is a process that a human being should undergo throughout the day in order to elevate from the lowest to the highest level. This process begins with positive spiritual deeds. According to the Zohar, spiritual deeds are actions that help bring about a dramatic change in our character. When we align ourselves with negative people and chaotic situations in life, we ignite self-centered reactions within ourselves. A spiritual deed occurs when we rise above this power of impulse and alter our emotional and behavioral responses.
Attaining higher levels of growth and evolving our own soul is our ultimate purpose in life, and the strength and inspiration to strive for these higher levels comes to us through the letters that compose this passage.