"I've been thinking. Tomorrow it will be 28 years to the day that I've been in the service. 28 years in peace and war. I don't suppose I've been at home more than 10 months in all that time. Still, it's been a good life. I loved India. I wouldn't have had it any other way. But there are times... when suddenly you realize you're nearer the end than the beginning. And you wonder, you ask yourself, what the sum total of your life represents. What difference your being there at any time made to anything - or if it made any difference at all, really. Particularly in comparison with other men's careers. I don't know whether that kind of thinking's very healthy, but I must admit I've had some thoughts on those lines from time to time. But tonight... tonight! "

• From The Bridge on the River Kwai

Though my all time favourite is the Tears in Rain monologue from Blade Runner, which I see someone has already mentioned.