Yoga moves you from the sympathetic nervous system to the parasympathetic nervous system, or from flight-or-flight to rest-and-digest.
You typically have less anxiety and enter a more relaxed state. As soon as you start breathing deeply, you slow down out of fight-or-flight to calm your nervous system
Through yoga, you get to know yourself and cultivate a more non-judgmental relationship with yourself. You are building self-trust.
At the end of the day, everything comes down to your relationship with yourself. When you get more confident and become more rooted in your inner self, you develop a healthy, balanced ego, where you have nothing to prove and nothing to hide. You become courageous, with high willpower.
Yoga makes us recognize qualities in ourselves that we were not aware of, helping us be more mindful.