Alan Watts
Author: Alan Watts
Publisher: Vintage (1973)

To say that man is both god and devil is not to say that spiritually minded people should spend some of their time robbing banks and torturing children.  Such violent excesses of passion are bred from the frustration of pursuing either aspect of our nature to the exclusion of the other.  They arise when the ruthless idealism of the spirit is dehumanized by the weakness of the flesh, or when the blind desire of the flesh is unenlightened by the wisdom of the spirit.