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We never really know what people are capable of until the only person they can rely on is themselves.

We have to learn how to work within the limits that are possible, not what is desirable.

We're all capable of anything as human beings. Any emotion, any action. We really are.

What constrains or enables the capacity of human beings to work in groups is not so much the technology, but rather the capacity of the human brain to have and monitor social interactions.

The goal for many amputees is no longer to reach a 'natural' level of ability but to exceed it, using whatever cutting-edge technology is available. As this new generation sees it, our tools are evolving faster than the human body, so why obey the limits of mere nature?

Any person who selects a goal in life which can be fully achieved, has already defined his own limitations.

As we advance in life, we learn the limits of our abilities.

I've always been an incredibly physically capable human being. I've always had good control of my body, walk a hundred feet on my hands, jump off rock wall and do a back flip into the sand. That's always been who I am.