The truth is that all the Sefirot are powers of the Supreme Mind. They all operate to bring about what is necessary in the world, all leading to one goal: the final, ultimate perfection, as explained above. These powers contain everything necessary for the government of the entire world at all times. For example, the power of Chessed, Kindness, includes all the ways in which it must act in the worlds, sometimes holding sway, sometimes yielding its dominion, sometimes dominating strongly, at others, more gently.
At times the power of Chessed operates in conjunction with Gevurah, Strength, in various different ways, whether in a revealed or hidden manner. Likewise, the powers of Din, Judgment, and Rachamim, Mercy, also contain everything necessary for the government of the entire world at all times.