I consider Christianity to be one of the great disasters of the human race... It would be impossible to imagine anything more un - Christianlike than theology.

The true method of discovery is like the flight of an aeroplane. It starts from the ground of particular observation; it makes a flight in the thin air of imaginative generalization; and it again lands for renewed observation rendered acute by rational interpretation.

Our reasonings grasp at straws for premises and float on gossamers for deductions.

Imagination is not to be divorced from the facts. It is a way of illuminating the facts.

Great people plant trees they'll never sit under.

In a sense, knowledge shrinks as wisdom grows, for details are swallowed up in principles. The details for knowledge which are important, will be picked up ad hoc in each avocation of life, but the habit of the active utilization of well-understood principles is the final possession of WISDOM.

Every organism requires an environment of friends, partly to shield it from violent changes, and partly to supply it with its wants.