Everything that we experience with our five physical senses is conveyed through vibrations. The same applies to the mental realm. Your thoughts are vibrations. Your emotions are vibrations where unconditional love (in the sense of loving another) is the highest and most subtle of vibrations while hate is the densest and most base. You can learn to control your mental vibrations at will.. and in so doing, influence emotional vibes as well.
The pineal gland, also known as the third eye, is famous for the secretion of hormones important in the proper functioning of the body, including melatonin. The pineal gland is considered by practitioners of yoga and a center neurotransmitter that supports the expansion of consciousness.
The practice of smudging dates back to prehistoric times, and is still very much in use today worldwide for cleansing everything from dwellings to human spirits. However recent research has shed light on the popularity of this activity, revealing that burning certain plant matter actually clears harmful bacteria.