Magick sees relationships between things. These relationships are called 'correspondences'. Although magical correspondences are not literally equal to one another, you can think of them that way (such as gold equals sun). Tables of these relationships, called 'Correspondence Tables', are available (an important one is Crowley's '777'). Thus one thing or symbol can be used to suggest another. This is important in magick, for the magician may surround himself with as many appropriate correspondences as he can to vividly affect the senses; thus making his magical contact with the inner planes more lucid.
The magical elements have correspondences with the tarot cards as the four suits. The four quarters (directions of the universe as used in magick ritual) and the Archangels also correspond with these same elements.
Element Suit Quarter Archangel
Astrological signs also correspond with the elements. Taurus, Virgo, and Capricorn are earth signs. Cancer, Scorpio, and Pisces are water signs. Aries, Leo and Sagittarius are fire signs. Gemini, Libra, and Aquarius are air signs.