For One to be Open, all One must do is not be Closed.
Aye; indeed t'is the rub that such is so much easier said than t'is done.
Yea, tho that be true; t'is but the knowledge thereof, itself, that arms the worthy Ones with the potential to be Aware, and thus to overcome.
T'is not a matter of innate ability: t'is rather a matter of choice; of practice; of attention: of Openness.
Seek that you may become Open (not that you aren't, but I know I so often forget and thus I assume that others must as well!) by attempting to train yourself not to be Closed; try to remember to not be Closed.
It only shrinks your world. Trust me: I've been there.
I sometimes forget to leave.
Moral of the story: Seek to be an Open Person rather than a Closed one. I don't mean extroverted or introverted, I don't mean monogamous or polyamorous, I don't mean liberal or conservative, I don't mean religious of atheist, I don't mean anything like that; It's much deeper: more fundamental to your Self:
*Do not close yourself off. That is damnation.
Remain in pursuit of Openness. It is the best path to Awakening.