Effort does not equal value

Years ago, we had a few yards of dirt delivered to our house that needed to be moved uphill about 50 yards to the back of our property. I started moving it with a wheelbarrow, but we eventually broke down and hired someone with a Bobcat to move it for us.

• If I had continued to move it by hand, it would have taken all day (say 8 hours).
• The guy on the Bobcat had it done in 20 minutes.