I think they both balance each other as both influence our
personality traits and behaviours in some or the other way.If one
factor is not present the other wont be able to work.The debate
always happens between the two,so a balance does exist as nature
and nurture do complement each other.
Nature is often defined in this debate as genetic or
hormone-based behaviors, while nurture is most commonly defined as
environment and experience.
While nature, or genetics, has been proven to be an important
factor in the development of some mental health conditions, such as
schizophrenia, bipolar, and major depression, the development of
mental illness is not entirely genetic.
Certain genetic factors may create a predisposition for a
particular illness, but the probability that a person develops that
illness depends in part on environment (nurture). When a genetic
variant indicates the possibility of development of a mental
illness, this information can be used to direct positive
(nurturing) behavior in such a way that the condition may not
develop or may develop with less severity.
Some genes, for example, cannot be activated without certain
environmental inputs. The development of vision is a prime example
of this. People cannot develop normal sight without exposure to
visual stimuli. Similarly, some environmental inputs may be
undermined by some genes. For example, some lifelong smokers may
never experience smoking-related illnesses, and this may be due at
least in part to their genes.
Environmental toxins may alter the expression of some genes,
and genes for many behaviors presumed to have a genetic basis have
not been discovered.