'Nature' in the Bible

For since the creation of the world his invisible attributes -- his eternal power and divine nature -- have been clearly seen, because they are understood through what has been made. So people are without excuse.

For whenever the Gentiles, who do not have the law, do by nature the things required by the law, these who do not have the law are a law to themselves.

For if you were cut off from what is by nature a wild olive tree, and grafted, contrary to nature, into a cultivated olive tree, how much more will these natural branches be grafted back into their own olive tree?