Echo and Narcissus flame," Echo's presence is revealed to Narcissus, who, after a comic, yet tragic scene, rejects her love. Echo prays, in her mind, of this to Venus, who makes Echo disappear, until she "remains a voice" and "is heard by all." Then, Narcissus "tired from both his enthusiasm for hunting and from the heat" rests by a spring, and whilst drinking, "a new thirst grows inside him" and he is "captivated by the image of the beauty he has seen". He falls deeply in love with "all the things for which he himself is admired." He then wastes away with love
Falling in love in love as one of projecting the anima or animus onto the other person, with all the potential for misunderstanding that can involve. Two chemical reactions associated with falling in love are increases in oxytocin and vasopressin; and Elisabeth Young-Bruehl has suggested that "when we fall in love we are falling into a stream of naturally occurring amphetamines running through the emotional centres of our very own brains". With regard to sociobiology, it is stressed that mate selection "cannot" be left to the head alone and must require complex neurochemical support. Critics of such Neo-Darwinism point out that over-simplistic physical