Background: My motto for this year is "Practicing the Presence of Christ." Basically this entails living a life as if Jesus is physically present. We all know that Jesus is watching over us in heaven and his spirit is everywhere. But because we can't see him or the Holy Spirit, we tend to be reluctant when it comes to sin.
Analogy: The way I generally clean the house or cook or drive when my mom is there is different from when she is not around. When she is present, I tend to be more careful and extra diligent, with the hope to impress her.
In like manner, if we live as though Jesus is physically present, we will be extra cautious with the decisions we make, the places we choose to go, the words we say, the choice of association, what we eat or drink.
The problem is not really that we don't know what is right or wrong, but we have adapted to the notion that, "YOU CAN DO WHATEVER YOU WANT TO DO, AS LONG AS YOU DON'T GET CAUGHT."
However, Jesus is patient with us, he won't strike us the moment we wrong him, hence because we don't face immediate punishment, we think we can get away with sin and repent later (that's if we remember to).
Moral of the story: Let us all Practice the Presence of Christ!