Letters 14.18

But what difference does it make who spoke the words? They were uttered for the world. He who craves riches feels fear on their account. No man, however, enjoys a blessing that brings anxiety; he is always trying to add a little more. While he puzzles over increasing his wealth, he forgets how to use it. He collects his accounts, he wears out the pavement in the forum, he turns over his ledger,—in short, he ceases to be master and becomes a steward. Farewell.

Seneca, Letters to Lucilius 14.18, translated by Richard Mott Gummere