Pompeius magnus, first Caesars allied and then his opponent.
"Having thus been set over the administration and management of the grain trade, Pompey sent out his agents and friends in various directions, while he himself sailed to Sicily, Sardinia and Africa, and collected grain. When he was about to set sail with it, there was a violent storm at sea, and the ship-captains hesitated to put out; but he led the way on board and ordered them to weigh anchor, crying with a loud voice: "To sail is necessary; to live is not." By this exercise of zeal and courage attended by good fortune, he filled the sea with ships and the markets with grain, so that the excess of what he had provided sufficed also for foreign peoples, and there was an abundant overflow, as from a spring, for all."
Plutarch - Life of Pompey 50
Translated by P. Bernadotte