Candace Pert describes emotions as "not only the familiar human experiences of anger, fear, sadness…but also basic sensations such as pleasure and pain, as well as the 'drive states'…such as hunger and thirst." In addition to measurable and observable emotions and states, Pert also includes in her definition of emotion an assortment of other intangible, subjective experience, such as spiritual inspiration, awe, bliss and other states of consciousness. [Pert, C. 1997, p131]