If you fear spiders, your reaction to a spider in your house may not be proportionate to the threat. While you may be tempted to burn the house down to kill a spider, the majority of spiders are not venomous to humans. Fear can paralyze your ability to react appropriately.
Benjamin Franklin nailed it when he said, "Fatigue is the best pillow." True story, Benny. There's nothing like pushing your body so far past exhaustion that you'd willingly, even longingly, take a nap on a concrete slab.