 These are not powers that the individual has at his disposal. They are rather powers that manifest themselves psychologically in the form of non-egoistic species-drives (Gattungstriebe) by which individuals periodically find themselves overwhelmed, especially those poets and thinkers in whose works the species-essence is most clearly instantiated.  [11]  Such manifestations include the experiences of erotic and platonic love; the drive to knowledge; the experience of being moved by the emotion expressed in music; the voice of conscience, which compels us to moderate our desires to avoid infringing on the freedom of others; compassion; admiration; and the urge to overcome our own moral and intellectual limitations. The latter urge, Feuerbach contends, presupposes an awareness that our individual limitations are not limitations of the species-essence, which functions thus as the norm or ideal toward which the individual’s efforts at self-transcendence are directed.