Once upon a time there was a monk, who farmed carrots.

Every day a thief would sneak into his farm and steal 3 carrots. The monk always tried to stop him, but never succeeded. He began to wonder why the thief was stealing exactly 3 carrots each time. He decided he was going to stop the thief. He started chasing him through the fields, but got outran very quickly.
- "I can't run that fast" - The monk thought.

He started training. He trained for days, weeks, months, until he became the fastest monk in the whole world. He then returned to his farm. As always, the thief appeared and took 3 carrots. The monk started chasing him through the fields until they reached a fence. The thief jumped over it, but the monk stopped.
- "I can't jump that high" - He thought.

He trained for days, weeks, months, until he became the highest jumping monk. He returns to the farm, the thief steals 3 carrots, he chases the thief through the fields, they both jump the fence and they arrive at a lake. The thief jumps into it and swims away.
- "I can't swim" - The monk thought.

He trained for days, weeks, months, until he became the best swimmer among all monks. He returns to the farm, the thief steals 3 carrots, he chases the thief through the fields, they both jump the fence, swim across the lake, they reach a mountain and the thief climbs it.
- "I can't climb" - The monk thought.

He started training climbing for days, weeks, months, until he became the best monk mountaineer in the world. He returs to his farm, the thief steals 3 carrots, the monk chases him, they both jump the fence, swim across the lake, climb the mountain. When they both arived at the mountain top, the monk blocks the thief's way. Suddenly, he punches the monk in the stomach.
- "I can't fight" - the monk thought.

He started training for days, weeks, months, until he became the best boxer of all monks. He returs to his farm, the thief steals 3 carrots, the monk chases him, they both jump the fence, swim across the lake, climb the mountain. When they both arive at the mountain top, the monk blocks the thief's way and knocks him down with one punch.
- "Why are you only stealing 3 carrots at a time?" - He asked the thief.
- "I will tell you, but promise to never tell anybody".

And the monk kept his promise.