The Gatekeeper to the Subconscious Mind is your Conscious Mind.

Nothing negative can find a foothold in me this day. No doubt or fear can attach itself to me. No accidents or mistakes can occur because I walk in a path of right action, both when I am thinking of it and when I am not. I release myself and all my affairs this day to the perfect working of that Perfect Law, which turns these thoughts into things.  Frederick W(illiam) Bailes

Although we all have one brain, we possess two minds or two phases of mind power - CONSCIOUS and SUBCONSCIOUS.
Bypass Your Critical Factor, Change Your Subconscious Blueprint and Quickly Get Your Heart's Desires! Dr Robert Anthony Author Of The Secret Of Deliberate Creation and Rich Mind Life. Silence Your Inner Gatekeeper - Free Audio Download Dr. Robert Anthony's "How to Make Your Mind a Money Magnet" Here

Abundance is about lovingly accepting WHO you are.

The Gatekeeper to the Subconscious Mind is your Conscious Mind. This is why when you are supposed to say affirmations or visualize your desired outcome, you are supposed to get your body into a relaxed state which automatically is supposed to bring your mind at least into the alpha state, at which time your conscious mind is being pushed aside and whatever you do with visualizing or affirmations at this time goes straight into your subconscious mind without the conscious mind interfering in the process.

This is also being explained by Dr. Joseph Murphy, the Power of your Subconscious Mind, and more recently by Dr. Robert Anthony, you can sign up for his 45 min free recording on How to Silence your Inner Gate Keeper here, http://www.thesecretofdeliberatecreation.com/dcshaudio6min.html

The Saboteur Within — Why You Don't Have What You Really Want by Dr. Robert Anthony

Bruce Lipton’s work was largely related to this. https://www.brucelipton.com/

The words and voice of Barrie Konicov."Hello, Greetings, and Welcome"