Any workout which does not involve a certain minimum of danger or responsibility does not improve the body - it just wears it out.
Norman MailerLike all men who are Napoleonic in their ambitionshe has instincts about the nature of growth, a lover's sense of the momentof crisis, and he knewhow costly is defeat when it is not soothed by greater consciousness, and how wasteful is the profit of victory when there is not the courage to employ it.
Norman Mailer