A martial arts student approaches his teacher and asks, “How long will it take me to master this craft?”

The teacher replies, “10 years.”

The student, looking impatient, responds, “I want to master it faster than that. I will work harder than anyone else. I will push myself to practice for many hours every single day. I won’t rest until I become a master. How long will it take then?”

The teacher considers this new information, smiles, and answers, “20 years.”