I respectfully agree with Elan. No, insecurity is NOT a feeling of inferiority, and it’s NOT about measuring your self worth, accomplishments, and/or successes to/by those of others. I suppose those might be the views of someone who is secure, or otherwise unfamiliar with insecurity. And it’s not always about feeling vulnerable either — that’s more fear, anxiety, and/or paranoia — it’s really about being unsure. Insecure people are concerned about making decisions without considering the ideas, positions and results of others. Secure people tend to need less, if any, input from others.
And, as Elan tries to communicate, those who experience life through the lens of insecurity, are more inclined to create and make decisions by evaluating their position and the possible results, with empathy and concern — they are unsure, requiring more input—rather than going forward based solely on their own ideas, thoughts and goals.
Insecurity is more like a guided missile that checks constantly if it’s on the right trajectory to its target, rather than just being launched into the air trusting — boldly and blindly — that it will hit the right target when it falls to earth. Some people will be guided missiles, , while others will be bold, blind rockets launched at a worthy target, expecting to hit it all or most of the time. Insecure people need to check, consider if they can/will hit the target, before they launch; secure people are more willing to launch, and launch again if they miss the target the first time.