We must be very careful with our actions...
The reason I say this is because, the more bad decisions you make, the easier it becomes to do it again. It's like our conscience has a way of relieving itself of the sting of guilt that it felt the first time.
It's like I have heard many people say, that a murderer has the hardest time killing his first victim. But after that, it gets easier and easier. The same is with rapist, thieves, robbers, liars, etc.
The hardest time to do something wrong is the first time. Then after that, it slowly gets easier and easier. So the only way to avoid BIG problems, is to avoid the first time. And if you've already done it a few times, stop now, before it becomes natural to you.
We have to always see wrong as wrong and never allow it to disguise itself as right.