Scientifically, if a person loses a part of his body, another part would get stronger to handle the work of a lost part. This video shows how a little kid who lost both arms, is able to feed himself with the aid of his legs.

What he does is to put his cutlery in between his toes for support, insert it in his food, then lift his legs to reach his mouth.

Really, nobody is disable, they are just unable to do normal things.

See more touching pictures + Video: on the link: http://www.olamzy.com/2016/10/awww-check-out-how-this-lad-with-no.html

That shows there's no limit to what you can achieve.
The sky is actually the starting point