Who will win?

Wise Man: Son, inside everyone of us, there is a wolf and a deer. Who do you think will win?

Disciple: Of course the wolf as it is a born predator.

Wise Man: You see, the deer is akin to your good side. While the wolf represents your bad behaviour. Between the good (deer) and the bad (wolf), the winner is the one that you feed regularly.

Disciple: Thank you Wise Man.