Once more unto the breach, dear friends

Once more unto the breach, dear friends, once more,
Or close the wall up with our English dead!
In peace there’s nothing so becomes a man
As modest stillness and humility;
But when the blast of war blows in our ears,
Then imitate the action of the tiger:
Stiffen the sinews, summon up the blood.
~ Shakespeare, Henry V (5.3.44-51)