In the Bible (1 Kings 17), we read the story of Elijah and the widow.
He asks her for bread and water and she replies that she only has a handful of oil and a little oil.
She then says that she only has a few sticks, she’s going to make her last meal for her and her son and then they will die.
When you get yourself in a negative frame of mind, you find yourself thinking like that.
Even the words you use are negative, in the way that you see the situation.