Regularly cleansing your aura and your personal energy is an essential act. Whether or not you know it, you come into contact with various people and environment, all of which have their own energy vibrations. Not all of these frequencies are high and positive; because your energy field is constantly taking in and putting out vibrations, some of the vibrations (including your own thoughts, as well as external influences) are low and will bring you down if left unchecked. While our energy body is constantly readjusting itself to bring our energy back into harmony, the negative energies can linger and build up over time. A weekly salt water bath is an easy and very relaxing way to cleanse your aura of negative energy.
Connecting to the powers of the Four Elements is a foundational practice for many Witches and Pagans. Earth, Air, Fire, and Water move through us and inspire us. As ideas, they help us to make sense of and to describe a complex world. Even the simplest of altars usually have some representation of the Elements.