Full Measure

Eight ounces in a coffee cup Sixteen ounces in a pound Both of these are things that you Can wrap your mind around Super-tankers plying the seas Hold millions of gallons of oil And weeks and years is how we see Our lives and the time that we toil Sixty seconds in a minute Twenty-four hours in a day Everything we know and have Is measured in this way We can quantify everything we know, But if I might be so bold Is there anyone that can tell me How much love a heart can hold?