We naturally absorb the feelings of the people around us, that's why regardless of what you want to achieve, it's a big competitive advantage to be surrounded by people who are calm, confident, optimistic about the future.

A common point between people with low self-esteem is that they never finished what they started. They once studied some foreign language, but never got fluent. They once invested a bit, but never got wealthy. They once learned some musical instrument, or played some sport, but never pushed themselves hard enough. Every time you give up in a half-hearted way, you accumulate a bit of frustration that slowly transforms into anxiety towards yourself, and into anger towards the world. Raising your standards and following through your own commitments is the therapy.

Feeling mentally at peace is just the sign that you are becoming who you want to be, and many people struggle with anxiety either because they have no clear idea of who they want to be, or because they don't want to pay the price and make the efforts to get there.