Throughout Scripture, we are warned that we should run to the good things that come from God and avoid the evil things that come from the devil. However, it seems that there is no place where this is better summed up than in Paul's first epistle to the Thessalonians, where he simply tells them to stay away from evil of every kind.
It is important for us to not only grasp this concept, but to live it out daily. If we fail to do so, we have failed God. We are not only told to stay away from a particular type of evil activity or way of thinking, but rather are commanded to stay away from every type of evil. This includes our thoughts, words, and actions.
The next time that an opportunity to do evil presents itself in any form, we must turn and walk the other way. We must not even play with evil, since to play with evil is to dance with the devil. Instead, when the opportunity to do evil presents itself, turn away from it and begin to think of ways to fulfill the great commission and further God's kingdom. Turn from the opportunity to do evil, and choose instead to do good.