Is being conscious of actions' consequences enough to attain nibbana?

I apologize if this has an answer on this site or if this does not make any sense. I am wondering if being conscious alone is enough to attain nibbana? If not, why? I think conscious person will (always?) act in a way that will not cause sorrow to themselves (and others?). I just thought someone who is fully aware of their thoughts and actions will only work towards a joyful life. If someone does anything that leads to sorrow, I think it's only due to lack of consciousness of it's consequences. However, I am not sure if being conscious alone is enough to develop the wisdom required to attain nibbana. Can someone consciously do unwholesome deeds? I would like to clear this up. Any help is appreciated.