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.
Travelling on his way, the Fool first encounters a Magician. Skillful, self-confident, a powerful magus with the infinite as a halo floating above his head, the Magician mesmerizes the Fool. When asked, the Fool gives over his bundled pack and stick to the Magician. Raising his wand to heaven, pointing his finger to Earth, the Magician calls on all powers; magically, the cloth of the pack unfolds upon the table, revealing its contents. And to the Fool's eyes it is as if the Magician has created the future with a word. There are all the possibilities laid out, all the directions he can take. The cool, airy Sword of intellect and communication, the fiery Wand of spirituality and ambition, the overflowing Chalice of Love and emotions, the solid Pentacle of work, possessions and body. With these tools, the Fool can create anything, make anything of his life. But here's the question, did the Magician create the tools, or were they already in the pack? Only the Magician knows - and on this mystery, our eloquent mage refuses to say a word.