Those numbers are your system load averages which show, um, the load that has been on your processor(s). You can see the same numbers when you use the "top" command in the terminal.
Life's not too short, you're just dead for so long.
The numbers mean how much load has been on your processor during different time intervals. The 1.79 is either the last 1 second (Mac OS X) or 1 minute (many other UNIXes). The next two are 5 and 10 seconds, or 5 and 10 minutes, respectively.
It is actually a measure of demand on the processor vs. how much the processor can actually do. So, a load above 1 means that your processor is being asked to do more than it can at once. That's not really bad, but
in the long run (i.e. load well above 1 for a long time) it's an indicator that something is overworking your machine.