"If you are wearing rose-tinted spectacles they will colour
every aspect of your visual experience. You may forget that you
are wearing them, but they will still affect what you see.
Immanuel Kant (1724–1804) believed that we are all walking
around understanding the world through a filter like this. The
filter is the human mind. It determines how we experience
everything and imposes a certain shape on that experience.
Everything we perceive takes place in time and space, and every
change has a cause. But according to Kant, that is not because of
the way reality ultimately is: it is a contribution of our minds.
We don’t have direct access to the way the world is. Nor can we
ever take the glasses off and see things as they truly are. We’re
stuck with this filter and without it we would be completely
unable to experience anything. All we can do is recognize that
it is there and understand how it affects and colours what we
experience."