Clifford D. Simak

Here lies one from a distant star, but the soil is not alien to him, for in death he belongs to the universe.

A religion is a system of symbols which acts to establish powerful, pervasive, and long-lasting moods in men by formulating conceptions of a general order of existence and clothing those conceptions with such an aura of factuality that the moods and motivations seem uniquely realistic.

Once there had been joy, but now there was only sadness, and it was not, he knew, alone the sadness of an empty house; it was the sadness of all else, the sadness of the Earth, the sadness of the failures and the empty triumphs.

The need of one human being for the approval of his fellow humans, the need for a certain cult of fellowship - a psychological, almost physiological need for approval of one's thought and action. A force that kept men from going off at unsocial tangents, a force that made for social security and human solidarity, for the working together of the human family.

Man's inability to understand and appreciate the thought and viewpoint of another man would be a stumbling block which no amount of mechanical ability could overcome.