Self-confidence is an important thing in one's life. Knowing what your are capable and what is beyond your reach is essential if you want to fully use your potential without overstepping it only to become incompetent at what you're doing. Large part of building your confidence is comparing yourself to others. But here an intrinsic discordance kicks in that capabilities and shortcomings of others are hidden by the facade of their public appearance, while your competence and weak points are much more accessible to your own scrutiny. Therefore it is essential to learn not only about yourself but also what's lying behind people's facades or you'll keep comparing yourself to illusions projected by others. Having a self-confidence is not only important for individuals but equally so also for companies. The performance of companies is almost always measured relatively to other companies. But as any experienced accountant will tell you, even comparing companies on the numbers (such as revenue or profit) will tell only part of the story that might not be so glamourous once you dig into actual details. Comparing with other companies on less measurable indicators, such as productivity or service performance and stability, is harder still and even more susceptible to imperception. To avoid fruitless discussions and distorted comparisons it is therefore important to measure and understand not only your own performance but also performance of your partners, competitors, and roles models. Doing so will quite often help you in suppressing unrealistic expectations or avoiding blame for other's people problems.