You have to agree that you are less and that someone else is more to feel inferior. If you don't agree, you can not possibly feel inferior. You might know something less, or you might be able to do something less, but you ARE unique and hence simply incomparable. Do not buy into being reduced to an object of comparison.
There are times when no matter how hard you try, you just cannot accept yourself as you are. During such times, think of how you look to God's eyes. In God's eyes, there is no judgment, there is only acceptance. God sees your light when all that you can see are your shadows. God loves you more than anyone could ever love you as you really are.
Unless you know how to set boundaries to form your safe space, you will always be concerned that saying 'yes' might put you in danger. So you will always pull back a little from saying 'yes' with your whole heart. Paradoxically, knowing how to say 'no' to form boundaries gives much more power to your 'yes'.
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