Fate...

The Novice asks the Master, "Master, what is fate?"

The Master replies, "It is that which gives a beast of burden its reason for existence. It is that which men of past eras had to bear upon their backs. It is that which has caused Nations to build byways from City to City upon which carts and coaches pass, and alongside which inns have come to be built to stave off Hunger, Thirst and Weariness. It is what drives Civilization ever onward in its quest."

The Novice responds, "And that is fate?"

Puzzled, the Master answers "Fate? Oh, I'm sorry. I thought you said Freight."