It is possible to change a kingdom than to change one's nature

There is a Chinese Saying “江山能改，本性难移” meaning by 'It is possible to change a kingdom than to change one's nature'

Hence if a man is evil, he can pretend to be holy yet it cannot last. Likewise to a kind man, he cannot pretend to be cruel for long =) Liken to what bible says, a good tree does not bare bad fruits and a bad tree does not bare good fruits. Since the best moment is when we are ourselves, why don't we be ourselves? =)