Paul-Henri Thiry Holbach

"Nature requires nothing of us but observation; superstition requires everything of us but observation."

"A society built on reason will always surpass one built on fear and obedience."

"The mind that questions is alive; the mind that obeys without question is merely existing."

"We mistake tradition for truth, and in doing so, we perpetuate ancient errors."

"Hatred springs not from disagreement but from the refusal to understand disagreement."

"In nature, there is no malice, no cruelty—only cause and effect, action and consequence."

"The pursuit of knowledge is the pursuit of freedom in its highest form."

"Man creates his own hell through ignorance and his own heaven through reason."

"To accept without questioning is to be a slave to whoever questions for you."

"Nature never deceives us; it is always we who deceive ourselves about nature."

"The priesthood survives by convincing us that we are naturally depraved and need their salvation."

"Superstition is the child of fear, and fear is the child of ignorance."

"All human virtue stems from the natural desire to live well with others."

"The universe cares nothing for our prayers but everything for our understanding."

"True friendship exists only between those who respect each other's capacity to think."

"Progress requires us to question what previous generations accepted without question."

"The only immortality that matters is the immortality of ideas in the minds of others."

"A man who fears his own thoughts is twice enslaved."

"Nature teaches us that adaptation is survival, and stagnation is death."

"We are happiest when pursuing knowledge, not when possessing it."

"The most dangerous person is not one who disagrees with you, but one who prevents you from disagreeing."

"To live by nature is to live without illusion or pretense."

"Every dogma is a prison with invisible walls that the prisoner cannot see."

"Reason is the only compass that will not deceive us in the darkness of uncertainty."

"The artist who creates without questioning society's norms becomes its unwitting servant."

"We measure a society not by its achievements but by how it treats those who question it."

"Nature's cruelty is honest; man's cruelty is hypocritical."

"The fear of death diminishes in proportion to our understanding of life."

"What we call conscience is merely enlightened self-interest wearing a mask of morality."

"The mind that has been freed cannot be re-enslaved except by its own consent."