Babylon 5, Season 3: Point of No Return

John Sheridan:
For three years now you've been pulling everyone's strings, getting us to do all the work, and you haven't done a damn thing but stand there and look cryptic! Well, it's about time you start pulling your own weight around here. […] I hear you've got a saying: "Understanding is a three-edged sword"? Well, we've got a saying, too: "Put your money where your mouth is"!

Kosh:
Impudent.

Sheridan:
Yeah? Well, maybe that's the only way to get through to you. You said you wanted to teach me to fight legends. Well, you're a legend too, and I am not going away until you agree!

Kosh:
Incorrect. Leave. Now.

Sheridan:
No.

Kosh:
Disobedient!

Sheridan:
Up yours!

[he gets thrown against the wall by an energy blast from Kosh]

Sheridan:
So, the real Kosh shows his colors at last, huh? You angry now? Angry enough to kill me? Because that's the only way I'm leaving. Unless your people get off their encounter-suited butts and do something, I've got nothing to lose! God, my own government wants to kill me, and if we lose this war, I'm just as dead! Our only chance is to get the other races on board for this fight and right now you're the key to doing that.

Kosh:
It is not yet time.

Sheridan:
And who decides that time? You? You put me in this position. You asked me to fight this damn war! Well, it's about time you let me fight it my way! How many people have already died fighting this war of yours, huh? How many more will die before you come down off that mountain and get involved? Ships, colonies, whole worlds are being destroyed out there, and you do nothing! How many more? How many more, Kosh? How many more dead before you're satisfied? Huh?

Kosh:
I will do as you ask. But there is a price to pay. I will not be there to help you when you go to Z'ha'dum.

Sheridan:
You already said if I go to Z'ha'dum, I'll die.

Kosh:
Yes, now.

Sheridan:
All right. If that's the trade-off. If you want to withhold your help when the time comes, that's fine. I'll go it alone.

Kosh:
You do not understand. But you will.