We should be agnostic about those things for which there is no evidence. We should not hold beliefs merely because they gratify our desires for after… - Julian Huxley

The last two thousand years have seen the development of elaborate monotheistic theologies; but in the process their single God has broken into many, or at least has assumed a number of distinct and indeed sometimes actively hostile forms; and their nominal universalism has degenerated into competition for the possession of absolute truth.

The world of things entered your infant mind
To populate that crystal cabinet.
Within its walls the strangest partners met,
And things turned thoughts did propagate their kind.
For, once within, corporeal fact could find
A spirit. Fact and you in mutual debt
Built there your little microcosm - which yet
Had hugest tasks to its small self assigned.

Dead men can live there, and converse with stars:
Equator speaks with pole, and night with day;
Spirit dissolves the world's material bars -
A million isolations burn away.
The Universe can live and work and plan,
At last made God within the mind of man.

Up till now human life has generally been, as Hobbes described it, "nasty, brutish and short"; the great majority of human beings (if they have not already died young) have been afflicted with misery in one form or another — poverty, disease, ill-health, over-work, cruelty, or oppression. They have attempted to lighten their misery by means of their hopes and their ideals. The trouble has been that the hopes have generally been unjustified, the ideals have generally failed to correspond with reality. The zestful but scientific exploration of possibilities and of the techniques for realizing them will make our hopes rational, and will set our ideals within the framework of reality, by showing how much of them are indeed realizable.