What lines are most important? Which lines should never be crossed?
Lines can be both literal and metaphorical. Literal being crossing a road with out looking left or right or when the little red man is still lit. However this question seems aimed toward the more symbolic lines. The most important being the life line.
In films (like Jacobs ladder for example) the life line is symolised through palm reading where the reader tells you how long you have to live (or in poor Jacobs case that the line is non existent). My opinion of a life line is how other people impact and interfere with your life. Any form of impact on your life changes you and may be something you will never forget.
You should never cross someone’s life in a way that would harm them, as it Can impact them forever and will always have a consequence.