Now the question arises: how to prepare the mind? The mind is just like a film taking all the photographs to make a moving picture, and it produces the same that was once taken in. The one who is critical, who looks at the ugly side of human nature, who has love for evil, love for gossip, who has the desire to see the bad side of things, who wishes to find the bad points of people, prepares a film in his mind. That film projected on the curtain produces undesirable impressions in the form of imagination.