To reinstate, MALKUTH, Earth, is the 10th Serphiroth on the Tree of Life, and is the placement of the 4 Tens.
The TEN OF CUPS is known as SATIETY, and is attributed to Mars in Pisces. Crowley calls this card, The Lord of Perfected Success, as this is the influence of MALKUTH in the unconscious Mental World known as Briah. Satiety, is word meaning, filled to the point of excess, though it is hard to argue that excessive happiness is a negative thing; However , it could be distracting.
What is exceptional about this card, is that the general astrological meaning of Mars in Pisces doesn't apply. Pisces is a watery sign, and Mars would signify a dispersal of energy to a point of frustration.
However, the meaning here is that fiery Mars causes
the Waters of Pisces to rush furiously into Briah. bringing great success on the Material plane of Malkuth. The imagery of this card expresses the opinion that all happiness is inspired from above, i.e. comes from the Divine. One could say that Happiness, is a higher-inner state of energy consciousness.
To be sure, when Tarot is used for Divination, it is best applied to Mundane matters, where as the meaning may be different if applied to a more spiritual plane. The Placement of the cards, in the reading will clarify this statement.
In ordinary matters, the divined meaning is , matters definitely arranged as wished, permanent and lasting success. This meaning of material success is reinforced if the 10 of Cup's lands on the position of "Beneath you" or "of House and Home", on a Celtic Cross layout. In fact, that would be paramount for this card, as it is a 10 of Malkuth (Kingdom) in a Earthly existence position.
Thank you for your interest and comments. May you live long and prosper!