Cymbeline -

Plenty and peace breed cowards.

Edward Gibbon, The Decline and Fall of the Roman Empire -

A martial nobility and stubborn commons, possessed of arms, tenacious of property, and collected into constitutional assemblies, form the only balance capable of preserving a free constitution against enterprises of an aspiring prince.

Horace -

"Caelum non animum mutant qui trans mare currunt."

“They change their sky, not their souls, who cross the sea.”