This mysterious passage interprets the seven years Jacob served Laban to win Rachel's hand as symbolizing the seven Sfirot. The secret in the matter is in the phrase, "and they seemed to him but a few days" - since they were served in the hidden or unrevealed world.
A man cannot win the hand of his soul mate until he merits her through his own spiritual growth and transformation. Jacob's seven years of service corresponds to the years, or lifetimes, that we must endure before the reunification of two halves can take place. When this spiritual truth is ingrained in our consciousness, and if we are proactive in the removal of our negative traits, we can hasten the arrival of our true soul mate.