Benny,
I agree with you to an extent. There certainly are mentally imposed limits having to do with our expectations and conditioned behavior.
The story about Milton Erickson and the Army sharpshooters demonstrates this. Briefly, he found that if he gave sharpshooters amnesia for having just made a shot, they could shoot bullseye after bullseye because each believed he was taking his first shot ... and they all agreed they could certainly make a bullseye with their first shot ... 20 in a row, however, many found impossible ... until the amnesia.
There are, however, physical limits. For all the movement toward removing limitations as the big goal, I tend to like the idea of simply accepting and working within some limitations.
There's a short story called The Bound Man about a guy who is bound up and finds himself, through adapting to his new limits, able to do a variety of things impossible in his previous, free, state.
Limitations can be just as valuable as freedoms.
Take art, for instance. It is good to live within the limitations of traditional forms of art and develop in that system ... then, once you have the form and skills, breaking the rules intelligently if that is your desire.
As to what our true limits are ... well, who knows. Who really knows what is possible? I don't think a reason should stop you from doing something. That wasn't my intention.
