Traditionally, the Magus is one who can demonstrate hands-on magic -- as in healing, transformative rituals, alchemical transmutations, charging of talismans and the like. A modern Magus is any person who completes the circuit between heaven and Earth, one who seeks to bring forth the divine 'gold' within her or himself. At the birth of Tarot, even a gifted healer who was not an ordained clergyman was considered to be in league with the Devil! For obvious reasons, the line between fooling the eye with sleight of hand, and charging the world with magical will was not clearly differentiated in the early Tarot cards.
Waite's image of the Magus as the solitary ritualist communing with the spirits of the elements -- with its formal arrangement of symbols and postures -- is a token of the freedom we have in modern times to declare our spiritual politics without fear of reprisal. The older cards were never so explicit about what the Magus was doing. It's best to keep your imagination open with this card. Visualize yourself manifesting something unique, guided by evolutionary forces that emerge spontaneously from within your soul.
At #1, the Magician is the male power of creation, creation by willpower and desire. In that ancient sense, it is the ability to make things so just by speaking them aloud. Reflecting this is the fact that the Magician is represented by Mercury. He represents the gift of tongues, a smooth talker, a salesman. Also clever with the slight of hand; a medicine man - either a real doctor or someone trying to sell you snake oil. The 4 suits laid out before him remind us of the 4 aces, which in the Tarot symbolise the raw, undeveloped, undirected power of each suit. When the Magician appears, he reveals these to you.
Most importantly, the Magician card stands for the "reveal" - as in a magic trick. The handkerchief is draped over an empty box, the Magician waves his wand, *presto!*--now there is a dove in the box. The Magician card does the same for the Querent--only what it reveals is not birds or rabbits but NEW ideas. Emphasis on NEW.