The Two in this suit signifies a union of souls. This card traditionally describes a romantic relationship, but also includes the idea that all good friendships and partnerships are based on a natural affinity and a deep mutual understanding. As a personal reflection, it can also signify that your mind and your soul are discovering each other, maybe for the first time.
This card also symbolizes a karmic tie, often portrayed by a wreath or figure-eight ribbon twining around the two cups. Occasionally you see a symbol referring to the union of alchemical opposites (as in sacred sex), pictured as a long-necked flask twined with serpents, its mouth spouting flames, sometimes with wings. This image is from Alchemy, indicating the refining and mutually completing effect of a true and lasting love.