It was the sort of day when people walk in the park and solve problems. "We'll simply call the taxi company, David, and request a large one, like one… - Daniel Handler

Entertaining a notion, like entertaining a baby cousin or entertaining a pack of hyenas, is a dangerous thing to refuse to do. If you refuse to entertain a baby cousin, the baby cousin may get bored and entertain itself by wandering off and falling down a well. If you refuse to entertain a pack of hyenas, they may become restless and entertain themselves by devouring you. But if you refuse to entertain a notion--which is just a fancy way of saying that you refuse to think about a certain idea--you have to be much braver than someone who is merely facing some bloodthirsty animals, or some parents who are upset and find their little darling at the bottom of a well, because nobody knows what an idea will do when it goes off to entertain itself, particularly if the idea comes from a sinister villain. - Lemony Snicket

The expression "Making a mountain out of a molehill" simply means making a big deal out of something that is actually a small deal, and it is easy to see how this expression came about. Molehills are simply mounds of earth serving as condominiums for moles, and they have never caused anyone harm except for maybe a stubbed toe if you were walking around the wilderness without any shoes on. Mountains, however, are very large mounds of earth and are constantly causing problems. They are very tall, and when people try to climb them they often fall off, or get lost and die of starvation. Sometimes, two countries fight over who really owns a mountain, and thousands of people have to go to war and come home grumpy or wounded. And, of course, mountains serve as homes to mountain goats and mountain lions, who enjoy attacking helpless picnickers and eating sandwiches or children. So when someone is making a mountain out of a molehill, they are pretending that something is as horrible as a war or a ruined picnic when it is really only as horrible as a stubbed toe.

...you know that a good, long session of weeping can often make you feel better, even if your circumstances have not changed one bit.