"Lost"
It's quite often not up to us to decide our private aspects in life. Best example: Friends. It depends not just on which point of curve you're standing on, but also people's interpretation of your behaviour. Your behaviour determines your image, and someday in future you might be entangled in troubles due to your tarnished image in "someone's" eyes. Is the self-claimed righteous person correct? Not necessary. But one thing is sure: when a self-claimed righteous person turns out to be a backstabber, he is an evil guy. The best way to deal with this kind of people: Seem to be lost, yet never get lost. Bonus: Be forgiving to them.
"Lust"
Prima facie it is an evil word. But it can work well if you manage it appropriately. Bear it in mind: it can be a motivation, but never, ever, a motive of your action.
"Love"
It's about an inherent matching between the special one and you. The magic within it is powerful in life as well: the only constant is change itself. Keep it fresh every day. If you're unable to do that, refresh it at least once a week. Try to make the feel fresh, but not to refresh your partner, because working the reversed way gonna make it being labelled as 'lust', instead of 'love'.
"Life"
Love your life, live your love. In whatever sense.
"Law"
Even a law professor can't explain it well, not to mention I? The justification for its vagueness is probably its nature of unlimited expansion to every facet of a man's life. It's its vagueness that makes it so intimidating to laymen, and so manipulative to persons in authority (whether it's manipulated in a good or bad way is not the crutch here). It's its vagueness that confuses law students and lawyers, yet the exact same thing ignites my passion for it.