John Maxwell tells of a study done by a group of scientists doing experiments on lab rats. In this test they took these rats and placed them in a big jar of water and put them in a room that was pitch black (no light at all), and they left these rats in the water. Now get this, in total darkness, the rats would only swim around for about 3 minutes before they would drown.
As they continued the test, they took some more rats and put them in those same jars of water and put them back in that same room. BUT this time, they allowed a single gleam of light to shine in. Just a single ray of light in the room. And those rats, for 36 hours, they swam and fought for their lives.
Just that single ray of hope, kept them alive 700x’s longer.
Where do you find your hope? I can't imagine what it must be like for those who try to "keep their head above water" without having the hope that comes from knowing Jesus.