"He that cannot reason is a fool. He that will not is a bigot. He that dare not is a slave"

In this quote, Andrew Carnegie is highlighting the significance of critical thinking and the threats of blindly following beliefs or orders. He specifies that someone who is not able to use factor and reasoning is a fool, as they are unable to make informed choices. Likewise, someone who refuses to utilize reason and instead clings to their own narrow-minded beliefs is a bigot. Lastly, Carnegie highlights the idea of nerve and bravery by specifying that someone who is too afraid to think for themselves and challenge authority is a servant to their own worries. In general, this quote acts as a tip to always question and think critically in order to avoid being a fool, bigot, or slave.