Assume that a ship is anchored at port with an anchor that has 613 links in its chain, representing the 613 commands in the Mosaic Law. If only one link breaks, the ship will be set adrift, so the 612 links that did hold count for nothing if just one is broken.

Or consider your situation if you had fallen over the edge of a very high cliff and were clinging to a chain for dear life. How many links of that chain must break before you would plummet to your death?

The Mosaic Law is the same, according to James 2:10. If you fail in one point, you might as well have blown it all—you’re dead either way.