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Great point @princessfrank. When we lack confidence it does tend to show up in other aspects of our lives which are visible to others. This can create a self fulfilling prophecy and continue the cycle (no confidence - showing no confidence - being treated with no confidence - still having no confidence).

This is where the saying "fake it until you make it" can be beneficial. Even if we are not confident in ourselves, making our outward appearance and actions confident can mitigate the damage that could otherwise be done. Breaking the cycle somewhere is an important step!