Question

essay on the whole purpose of education is to turn mirrors into windows

Answer 1

I would not quite agree with this. The purpose of education is both to understand yourself as a person (inward looking - represented by a mirror) and to understand the world around us (outward looking - represented by the window).  However, the present day education hardly lays any stress on self understanding and therefore there is so much of stress and anxiety all around. 

It is up to you what stance you would want to take. My suggestion would be that you write in terms of what I have mentioned above in the 1st para.