How do You Know?

I try so hard,
to let you see,
who I am,
and who is me,
you choose not to listen,
you close your eyes,
you can not see,
yes you are blind,
all these things,
that fill this place,
you do not care,
and turn your face,
you block out words,
you block out light,
so how do you know,
what's day and night?