On the Happy Life, Section 26

Seneca — The Senator

You sit around playing with your wealth and don't see the dangers coming. You're like those primitive people who get besieged by an enemy army. They don't understand siege weapons, so they just watch the attackers building their machines in the distance. They have no idea what's about to hit them. That's exactly what you're doing. You fall asleep counting your money and never think about all the disasters lurking around you, ready to steal your precious things. But here's the difference: if you take wealth away from a wise person, you still leave them with everything that truly belongs to them. They live happily in the present and aren't afraid of the future.

Seneca — The Senator Original

You sit idly playing with your wealth and do not foresee the perils in store for it, as savages generally do when besieged, for, not understanding the use of siege artillery, they look on idly at the labours of the besiegers and do not understand the object of the machines which they are putting together at a distance: and this is exactly what happens to you: you go to sleep over your property, and never reflect how many misfortunes loom menacingly around you on all sides, and soon will plunder you of costly spoils, but if one takes away riches from the wise man, one leaves him still in possession of all that is his: for he lives happy in the present, and without fear for the future.