Gosh, where to begin with a guy like Kirk? He's got so much canon you could pull from. But if we're just looking at the reboot movies Jim's best quotes are all very short and are about context as much as they are the words.

"I don't believe in 'No-Win' scenarios." Is the most often used summation of Jim Kirk as a character, but my personal favorite comes from Into Darkness.

"You're right. You're not making the climb." The determination to save his crew at the cost of his own life, knowing his choice is lethal. Jim Kirk doesn't believe in No Win scenarios, even if pulling off a miracle means he won't be there to see it.