Apophthegmata Laconica

Plutarch

Plutarch. Moralia, Vol. III. Babbitt, Frank Cole, translator. Cambridge, MA: Harvard University Press; London: William Heinemann Ltd., 1931 (printing).

Alcamenes, the son of Teleclus, when somebody inquired how a man could best keep a kingdom secure, said, If he should not hold his own advantage too high.