Extended time spent in any given environment can or will change an individual.

However,
One does have
Some control over the change,
Be it
Positive or
Negative
And the extent
Thereof.

Positivity and
Negativity,
At opposite ends
Of the spectrum
Like
Light and dark.

After one ends,
The other starts.

Night and day,
At some points from each other,
Not too often far away.