it means change .... change from within in the belief system and behavior...like being a new person something you weren't....

I love that word...in art it's so0 difficult cuz you have to change the idea and the picture into something so0 different yet you should still keep the spirit....

The only example I know is about leonardo da vinci's paintings. really interesting

You already said that, a secret message embedded in artworks, as paintings, I also saw the film it was gorgeous. Da Vinci's paintings are full of these look at them carefully..really exciting!