The art of learning is the art of questioning.
Wisdom is about absorbing from every interaction, about delving deep into the multitude of thoughts and subtle expressions people portray.
The General emphasizes the imperativeness of embracing new ideas while maintaining the readiness to challenge them, to seek the truth yet to be prepared to obliterate it as soon as it becomes a fabrication.
This is about being open to new ideas and only accepting them to be true after you test them.