There is a fine line between stubbornness and stupidity as well as intensity and insanity.
As everyone knows, there is often a rather fine line between laughing and crying
There's more to good or bad than what's written in the Rulebook.
Fine is the line between vengeance and justice. Blur it and you become no better than him.
There's a fine line between forgiveness and denial.
How easy to be electrocuted. How fine the line between beauty and peril.
