A man who made spears and shields once visited Akbar's court. He said, 'Your Majesty, nobody can make shields and spears to equal mine. My shields are so strong that nothing can pierce them and my spears are so sharp that there's nothing they cannot pierce.' Birbal was sure that he could prove him wrong, but the man thought it was impossible. Birbal finally said, 'Hold up one of your shields and I will pierce it with one of your spears,' said Birbal with a smile.
Confidence is a great quality, but overconfidence is equally bad. It's impossible to know everything and that's the reason we should never stop learning.