I will also repeat this point: (Demetrius Laco, On Textual and Exegetical Problems, col. 67, McOsker translation) [Man is said to be "by nature" a procurer of fo]od, since he does so by unperverted instinct; to be "by nature" susceptible to pain, since he is so by compulsion; "by nature" to pursue virtue, since he does so to his advantage; and we say that the first utterances of names were "by nature"...
So here we have acting "by nature" means acting:
[1] by our unperverted instinct (eg, pursuing food and speaking)
[2] by our compulsion (eg, avoiding pain)
and also,
[3] for our advantage!!! (ie, pursuing virtues, eg, property management)