Agility and open-mindedness are critical attributes for individuals and companies to succeed. Being stuck in a 'that isn't how it's done here' mentality can lead to failure. Success requires embracing change and having a flexible mindset. Improving open-mindedness and agility involves recognizing the sources of one's beliefs and being open to different perspectives. The 'Thinker on the Prover' concept highlights how individuals adopt beliefs from various sources and then seek confirmation to justify them. Overcoming biases and improving agility involves challenging one's beliefs and being willing to consider alternate viewpoints.