How can a person just let go of insecurities that have been created in their past and has nothing to do with who they are today?

Insecurites are set free by knowing that you are loved. If you can imagine parental love...really try to focus on what that means. I love my sons. Period. There is nothing they could ever do (or not do) that would make me love them less or more. I love them through their triumphs and through their stupid failures and/or mistakes. I love them. Adore them. Value them. Cheer for them. Stand with them. Encourage them...and so on....

Well...that is how you are loved! God loves you just as a parent loves a child. You are his child. If you don't appreciate the religious tone, I would encourage you to simply focus on the parental love analogy. You are loved and any insecurites which you may possess are because you do not feel worthy of love. It doesn't matter if you are worthy or not...YOU ARE LOVED! Whether you like it or not...you are loved. You are adored and cherished just as a mother adores and cherishes her infant child. It's that simple.

Once you accept this truth, this concept, all your insecurites will disappear! They will return often as that little voice in your head that lies to you and tells your spirit that you are not loved. Simply remind yourself (re-mind means to change your mind...to think again) that you are adored in SPITE of anything that has or has not happened to you. In spite of all that is against every single human being, we are loved. That includes you.

Re-place (change what is in one place for another) negative thoughts about yourself and your insecurities with the truth about us all...we are loved. We're all insecure at points in our lives, it is a part of the human condition. Just remember that you are loved!