Imagine this: you're on a pleasant hiking trip, when you wander off the trail and soon realize that you're lost. You head back in the direction you came from... at least you think it's that way... and before you know it you've been walking for hours and still haven't found your way back to the trail. The sun is going down, and air is cooling, and you're all alone. What are you going to do?
If you're the type of person who likes to be prepared, then chances are you packed a survival knife in your backpack before heading down the trail. And boy are you glad you did!
With just a few hours before dusk, you use your best survival knife to hack down a few saplings to build a shelter and use the knife's built-in fire starter to get a blaze going. On a chilly night like this one, you'll be grateful for a shelter and a warm fire.
By morning, you're refreshed and you start hiking east in the direction of a well-known highway. Before long you've made it back to civilization and are enjoying a nice, hot shower. You think back to the night before and imagine what the night would have been like without your survival knife. You know that you'll never leave home without it again.