According to Osho, true intelligence flowers from the humility of understanding your own ignorance. Recognizing 'I know nothing' dissolves stubbornness and secondhand knowledge, making you relaxed, sensitive, and open. This innocent not-knowing is the highest understanding; it unburdens the mind and tunes you to life's mystery. Thus intelligence and understanding are one movement: awareness of ignorance becoming receptivity to existence.
Admitting you don't know makes you truly smart and able to understand life as it teaches you.