The Aces all represent the seed or germ, or single point of spiritual principal from which all of the other cards of a suit are generated. They are potential – infinite potential.
The Ace of Wands sits atop the Tree of Life in Atziluth, the first “world” (or spiritual plane) of the Kabbalah.
The Ace of Wands represents primordial fire, the spark of passion, the spirit and creative energy.
The Ace of Cups is the card of joy and nourishment for the soul.
The Ace of Swords is the card of new ideas and the triumph of the mind.