Man has been called a rational being, but rationality is a matter of choice – and the alternative his nature offers him is: rational being or suicidal animal. Man has to be man – by choice; he has to hold his life as a value – by choice; he has to learn to sustain it – by choice; he has to discover the values it requires and practice his virtues – by choice. Ayn Rand
‘Galt’s Speech,’ Atlas Shrugged