Although Thomas Henry Huxley is most commonly known as Charles Darwin’s Bulldog (Pitbull, today?), the fact remains that he was one of the most insightful thinkers to ever write about the nature of science and its methods.

Huxley coined the common usage of the word agnostic (as in “not” or “un” knowing) in contradistinction to the more commonly used Greek word gnosis (as in “knowing” or “to know”). He was an eminently rational man, who though critical of dogmatic religion and believed in the high ethical standards of Judaism and Christianity in terms of how we should treat one another. 

This small book contains 100 aphorisms from a much larger collection culled by Henrietta A. Huxley at the beginning of the 20th century and published in London, England, in 1908. Our hope is that these penetrating thoughts (occasionally Koan-like in their import) will serve as guideposts on how to become a better critical thinker in all endeavors, scientific or otherwise.