Quotes from Frontinus

Inventions reached their limit long ago, and I see no hope for further development.

When Marcus Crassus had constructed a ditch around the forces of Spartacus, the latter at night filled it with the boddies of prisoners and cattle that he had slain, and thus marched across it.

I will ignore all ideas for new works and engines of war, the invention of which has reached its limits and for whose improvement I see no further hope.