'Nature' in the Bible

Because of this, God gave them over to degrading passions, for their females exchanged the natural relations for those contrary to nature,

For whenever the Gentiles, who do not have the law, do by nature the things of the law, these, [although they] do not have the law, are a law to themselves,

And the uncircumcised person by nature who carries out the law will judge you who, [though provided] with {the precise written code} and circumcision [are] a transgressor of the law.

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