This one resonated with me because of the value of "no." A person's ability to be their own person begins with No. But the placing of the No matters - slave morality says No to the self, drawing a circle around self and dividing self from other, but choosing to deny self in favor of other. Master morality says Yes to self, and Yes to other, but it begins with the ability to say No. 

Or in vastly simpler terms : those who go along to get along are slaves.