Who said "The sea is both a highway and a fortress."?

This quote is attributed to Themistocles.

The sea is both a highway and a fortress. - Themistocles

"The sea is both a highway and a fortress."

Themistocles

Statesman General Ancient Greece 524–460

"A man is not finished when he is defeated. He is finished when he quits."

"The victor will not be asked afterwards whether he told the truth."

"Persuasion is a far more powerful weapon than force."

"Do not despise the enemy that is down, for fortune is fickle."