Personality also has an influence on the other planes, just as character and nature have. If Farid could change himself into a cow by concentration, there is nothing in this world which cannot change; but only if we want to change; the one who does not care to change will never change. But the power constantly working from within can no doubt change the nature to anything, right or wrong. The life of humanity is not only nature, it is an art, and art is an improvement on nature; through art God finishes His creation. That is why the building of the character and the developing of the personality is an art, an art by which the purpose of life is fulfilled.