Full Idea
Why, to your shame, are you so careless that you do not know your handful of slaves by sight?
Gist of Idea
It is shameful to not even recognise your own slaves
Source
Seneca the Younger (On the Happy Life [c.60], §17)
Book Reference
Seneca: 'Dialogues and Essays', ed/tr. Davie,John [Penguin 2007], p.99