Convictions are more dangerous enemies of truth than lies.

The strength of a belief proves nothing about its truth - only the strength of the believer's need.

What is believed by everyone, always, is most likely to be false: humanity's herd instinct speaks here.

The most dangerous beliefs are those we mistake for reality itself.

Every belief is a barrier to vision - choose your blindness wisely.

The believer in a system is like someone living inside a house - they no longer see the house itself.

No one constructs beliefs except on the foundation of their own character.

The greatest beliefs are born from the deepest doubts - only those who have trembled can truly stand firm.

He who has a why to live for can bear almost any how - but only if the why is worthy of the how.

The belief in truth begins with the mistrust of all inherited truths.

The surest way to corrupt a youth is to instruct him to hold in higher esteem those who think alike than those who think differently.

In individuals, insanity is rare; but in groups, parties, nations and epochs, it is the rule.

The belief in God is dead, but the need for gods remains - beware what you worship in His place.