I absolutely loved this post. It's lovely that way of looking at it and I totally agree with you, we're already full. Without exception, we are always complete and that which we think is missing is inside us, or maybe on the tip of our nose and we haven't noticed it.
Happiness, for example, we look tirelessly outside and it turns out that if we explore enough, we can realize that it was always there, inside, in the simple things.
Because at the end of the day, simplicity is completeness.