We all have habits, both good and bad. Anything you do automatically without consciously thinking about it, or without specifically deciding to do it, is a habit. Good habits or practices--such as tidiness, courtesy, good manners etc. are a real blessing. But when the habits you've picked up are BAD or DESTRUCTIVE, and you find them hard or almost impossible to change, they are known as VICES.
How many times have you tried to quit a bad habit, but found yourself almost powerless to get rid of it or stop doing it, no matter how much you tried to exert will power against it? The fact is that, in one area or another, we are all weak and very human and fallible, and subject to many different problems which can turn into bad habits and vices.