Romans 14:13 Let us not therefore judge one another any more: but judge this rather, that no man put a stumbling block or an occasion to fall in his brother's way.
Romans 14:19 Let us therefore follow after the things which make for peace, and things wherewith one may edify another.
Romans 14:21 It is good neither to eat flesh, nor to drink wine, nor any thing whereby thy brother stumbleth, or is offended, or is made weak.
Mark 9:42 And whosoever shall offend one of these little ones that believe in me, it is better for him that a millstone were hanged about his neck, and he were cast into the sea.
These verses talk about offending or causing another brother/sister in Christ to sin. Romans 14 tells us that we are not be a stumbling block to others. Instead we are to lift each other up by living in peace. It also says that we shouldn't do anything that would cause someone to sin like drink.
The verse in Mark says that it is better for us to die than to cause a new believer to sin. That's pretty harsh sounding, huh? We need to be sure to think about what we are doing and how others might perceive it. I don't want to do anything that might cause someone to sin because that sin can put a damper on our relationship with God. So, I don't want to hinder someone's relationship to Jesus in any way!
In our daily lives we need to be conscious of things we do that might cause others to sin; even if it is in their minds. For example, if a lady was to dress in a revealing way that might cause a man to look on her with lust in his heart. That man has sinned and that lady was the cause of it. If she was dressed modestly. the man would be less likely to think of her in that way. By dressing modestly women can decide they will not be the cause of a man's lust.