The poor one is not the man who has little, but the man who craves more.
[Non qui parum habet, sed qui plus cupit, pauper est.]
Seneca the Younger (c. 4 BC-AD 65) Roman statesman, philosopher, playwright [Lucius Annaeus Seneca]
Moral Letters to Lucilius [Epistulae morales ad Lucilium], letter 2 “On Discursiveness in Reading,” sec. 6
Alt trans. (Gummere (1918)): "It is not the man who has too little, but the man who craves more, that is poor."