Morally speaking,it is wrong to lie and the Scriptures also does not mince words about the destination of liars.But i have noticed that sometimes Christians lie and they justify themselves by saying they are only applying wisdom.Some will probably refer to the case of Abraham when he lied about his wife Sarah that she was just his sister(Sarah was actually his sister but he hid the truth that she was also his wife).This is usually done by believers to salvage themselves in some 'tight' circumstances.Some believe lie is still lie and is therefore a sin and some believe it is wisdom in some situation and so is not a sin in those instances.What is your view on this?