The bay leaf is a symbol of wisdom. In folklore and magick it is used to induce physic powers, bring prophetic dreams, protection, healing, purification and promote strength. Apollo, God of the sun, youth, beauty, archery, music, dance, truth, healing and prophecy wore a bay-laurel wreath in ancient Greek mythology. Further in Roman history bay laurel was woven into wreaths and worn as a crown of success symbolizing victory and honor.
Combined with white sage it can banish and protect against negative energy and spirits. For this use it is more effective on a person than on a space to ward off draining, negative emotions and welcome in new beginings.