Others are watching our actions and determining by our conduct what is good or bad. For example, a Christian who goes into a bar for a seemingly innocent reason sets a bad example, even if they would never dream of touching a drink. I have known of more than one case where a Christian was spending an inordinate amount of time with another person who was not their spouse and it not only caused turmoil, both in their personal lives and in the church.
The point is that we need to be careful what we are seen doing. This is especially true when it comes to the children. Children see inappropriate behavior and have a difficult time discerning what is proper because they see people they trust to know better acting badly (Matthew 5:16). Make sure your ex- ample glorifies God instead of tarnishes Him.