Atheism may be defined as the mental attitude which unreservedly accepts the supremacy of reason and aims at establishing a lifestyle and ethical outlook verifiable by experience and the scientific method, independent of all arbitrary assumptions of authority and creeds. - Madalyn Murray O'Hair
The depravity of man is at once the most empirically verifiable reality but at the same time the most intellectually resisted fact. - Malcolm Muggeridge
Science replaces private prejudice with public, verifiable evidence. - Richard Dawkins