The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

belief is the death of intelligence.

Blind belief in authority is the greatest enemy of truth.

Facts are the enemy of truth.

Knowledge is dangerous.

These men are the enemies of science—of intellectual progress. They ridicule and calumniate the great thinkers. They deny everything that conflicts with the “sacred Scriptures.” They still believe in the astronomy of Joshua and the geology of Moses. They believe in the miracles of the past, and deny the demonstrations of the present. They are the foes of facts—the enemies of knowledge. A desire to be happy here, they regard as wicked and worldly—but a desire to be happy in another world, as virtuous and spiritual.

I care not for the girdings of superstition, for superstition is the bitter enemy of knowledge & true morality. Yes; it has come to this! Men who openly confess that they can form no idea of God, & only know him through created things, of which they know not the causes, can unblushingly accuse philosophers of Atheism.

Facts, my dear Sancho, are the enemy of truth.

Fools hate knowledge

Knowledge becomes evil if the aim be not virtuous.

Belief is the death of intelligence. As soon as one believes a doctrine of any sort, or assumes certitude, one stops thinking about that aspect of existence.

A foolish faith in authority is the worst enemy of truth.

Belief gets in the way of learning.

Every other knowledge is harmful to him who does not have knowledge of goodness.