The part of your creative and perceptual capacity that you know and you commonly use are a small slice of your full potential. Just so, you normally attend to only a small slice of all that is, and you have become desensitized to information and sensations that are available to you.
The ego is a jealous god. It does not want to admit the reality of any dimensions except those it understands, and within which it feels comfortable. It was meant to be an aid, but it has been allowed to become a tyrant. Even so, it is much more resilient and eager to learn than is generally supposed. It is not natively rigid, and its curiosity can be of great value.
If you have a limited conception of the nature of reality, then the ego will do its best to keep you in that small, enclosed area. But given free play, your instincts and creative energy can communicate something of a wider existence to your limited, physical form.