The Emperor is both Mars and the letter- Tzaddi. The Hebrew letter, Tzaddi, refers to the sign of Aries in the Zodiac and the ruler of Aries which is Mars and the resulting combination exalts the Sun. All of which implies that Aries and Mars is a combination of energy in its most material form with the idea of Authority.
The Thoth Deck Emperor is illustrated as an imperial figure bedecked with crown and imperial vestments. His throne shows capitals that are representative of Himalayan Ram heads which also represent Aries the Ram. The conchant lamb and upright flag at his feet represent his domesticated attribution on the lower planes. As is noticed in both government (the flag) and Rams, if untamed they both are wild and courageous, lonely in lonely places, whereas when tame they both are made to lie down in green pastures becoming docile and cowardly.
The Emperor also represents the alchemical element, Sulfur, as shown by his posed head and arms forming a triangle, below crossed legs form the cross, making a complete sigil of the alchemical sulfur. In the Gnosis of Alchemy, Sulfur is the male fiery energy of the Universe and corresponds to the Qabalistic Fiery- swift creative energy, the initiative of all Being. The Bee and Fleur-de-lys, both support the Imperial image as ancient signs of imperial power. The quality of this power is prone to sudden,violent but impermanent activity, so this fiery power must not persist for too long or it burns and destroys.
The Rams head septure is a obvious continuance of authority and Aries. The Orb with the Maltese cross and the Aries septure imply that his authority and power are now established governance. The shield at his feet, represents the two headed eagle crowned with a crimson disk which is symbolic of the Alchemist's red tincture, of the nature of gold. The golden eagle, the Sun, is consort to the white eagle, the moon, silver, of the Empress.
In the final observation of this card, the white light descending upon his head is Chokma and symbolizes Chokmah's authority of creative wisdom, the Logos, and is exerted upon Tiphareth (Beauty), the organized man. This makes sense, if you understand that Beauty is a perfect organization of opposites... a Jungian syncronisity.
When this card is thrown during a reading, it implies , war, strife, conquest, victory and ambition; all the martial arts. But these traits aren't always so destructive as the Emperor also implies, personal power and leadership; power from insight, possessing a global sense of issues and serving those around you. The character of the Emperor is Patriarchal, which could also implies that the querent is up against an angry patriarchal structure of some kind, which includes rigidity and maybe even nastiness. A confrontation with authority or even with some part of ones self which is feeling rigid and afraid. Interpretations of which depend on the dignity of the accompanying cards.
For the student of Higher Magicks, the septure in the Emperor's right hand also represents
the Lightning- Phallus of Shiva, giving rise to the Tarot Wand. This was originally the Trident (ternary Phallic symbol of Father, Son and Holy Ghost) born by the Western gods, Neptune, Jupiter, Hades, Poseidon, Pluto and Lucifer. Also the Trident was associated with Osiris and later on, to the Guardian of the Holy Grail. The study of these mythological gods, will give great metaphorical sexual insight to the diligent student about the necessary combinations of Male electric and Female Magnetic Force for the practice of Magick manifestations.
Thank you for your interest and comments, May you live long and prosper!.