Brenda: So, Nash was illegitimate?
Doctor: Yeah, for about a minute and a half. He died right after she did.
Connor MacLeod: I apologize for calling your wife a bloated warthog, and I bid you good day.
Connor MacLeod: I am Connor MacLeod of the Clan MacLeod. I was born in 1518 in the village of Glenfinnan on the shores of Loch Shiel. And I am immortal.
Hotel clerk: I hope you get your head chopped off, asshole.
Ramirez: Sometimes, MacLeod, the sharpest blade isn't enough.
Rachel: Will you listen to me for one moment? You can't hide your feelings from me! I've known you too long.
Connor MacLeod: What feelings?
Rachel: How about loneliness?
Connor MacLeod: I'm not lonely. I've got everything I need right here.
Rachel: Oh no you don't. You refuse to let anyone love you.
Connor MacLeod: Love is for poets.
Ramirez: Why does the sun come up, or are the stars just pinholes in the curtain of night?
Ramirez: Patience, Highlander. You have done well. But it will take time. There are generations being born and dying. You're at one with all living things. Each man's thoughts and dreams are yours to know. You have power beyond imagination. Use it well my friend. Don't lose your head.
Ramirez: The sensation you are feeling is the quickening.
Connor MacLeod: Who are you?
Ramirez: We are the same, MacLeod. We are brothers.
Ramirez: The Kurgan. He is the strongest of all the immortals. He's the perfect warrior. If he wins the Prize, mortal man would suffer an eternity of darkness.
Connor MacLeod: How do you fight such a savage?
Ramirez: With heart, faith and steel. In the end there can be only one.
Connor MacLeod: I've been alive for four and a half centuries, and I cannot die.
Brenda: Well, everyone has got their problems.
Connor MacLeod: Wanna hear another theory?
Lieutenant Frank Moran: Uh-huh.
Connor MacLeod: This Fasil was so upset about the lousy wrestling tonight, that he went down to the garage and in a fit of depression cut off his own head.
Connor MacLeod: What are you looking at, Rachel?
Rachel: The eyes in the back of your head. People are asking about you. What am I supposed to tell them?
Connor MacLeod: Simple. Tell them I'm immortal.
Connor MacLeod: What is it?
Sunda Kastagir: Boom-boom. A big strong man like you shouldn't be afraid of a little boom-boom. Or maybe you think I'm trying to poison you.
Connor MacLeod: I think you're crazy, Kastagir.
Angus MacLeod: He's a Highlander, by God, and the last sound he hears should not be that of a wailing woman.
Sunda Kastagir: Macleod, it's good to see you again. It seems like a hundred years.
Connor MacLeod: It's been a hundred years.
Kurgan: I'm in disguise.
Garfield: You talk funny Nash. Where you from?
Nash: Lots of different places.
Connor MacLeod: Nice to see you Kurgan. Who cuts your hair?
Answer: What the punishment is isn't shown in this movie, but since even the Kurgan follows it, it must be high. In Highlander 3 we see that fighting on holy ground at least destroys the weapons they are fighting with (although only Macleod's for some reason), it's possible the ultimate penalty is given when an immortal kills another immortal on holy ground. A good guess is the penalty is death.
lionhead