How to Sharpen a Knife Without Tools

You have a rusty knife but need a sharp one. But you have no whetstone or other tools at hand.

Steps

1
Find a piece of stone of convenient size and shape. any variety will do, even a piece of cement.
2
Scrape most of the rust off the blade, especially along the cutting edge.
3
Keep scraping diagonally toward and across the cutting edge, alternating sides from time to time.
4
Try "lubricating" this process with a little water.
5
A tiny steel "feather" will form along the edge as it grows sharper. Remove this feather by drawing the cutting edge through a piece of wood.
6
When you are satisfied that you can get the blade no sharper with your stone, whet the blade further by drawing it diagonally across a leather shoe sole.
7
Within a few minutes have a usable cutting instrument.
8
Finished.