“For I now call a freedom from anxiety a security, on which freedom a happy life depends.”
Cicero treats inner security as freedom from destabilizing anxiety, making mental steadiness an important condition of a genuinely happy and self-directed life.
Source details
Tusculan Disputations, Book V, section XIV, represented by Project Gutenberg #14988. Cicero defines security parenthetically as freedom from anxiety while arguing that a happy life must rest on stable goods and virtue rather than vulnerable externals. It remains ancient philosophical psychology mediated by translation, not modern clinical anxiety-treatment evidence.