You really don’t know how strong you are until life tests you.
And when everything around you goes to hell you find yourself just wanting to chuck it all and run away.
But you can’t.  You have responsibilities, people who count on you, and so you press on — you simply endure.
One of my favorite books of all time is Larry McMurtry’s Lonesome Dove.  
In one chapter the cowboys are moving thousands of cattle up the trail when they are beset by locusts so thick they blot out the sun.
One frightened young man gallops up to the leader of the drive and cries, “Captain, whatever can we do?”
“Live through it,” replied the captain.
That’s life.
Sometimes we just have to hold on and live through it.