The right of nature... is the liberty each man hath to use his own power, as he will himself, for the preservation of his own nature; that is to say, of his own life.

This quote means that every person has the right to do whatever is necessary for them to stay alive. This could include things such as getting food, shelter, and clothing, or making sure that their lives are not put in danger. It is important to note that this right of nature comes from the power each individual has to preserve their own life, rather than any law or other outside force.