Game of Thrones, Season 1

Aemon Targaryen:
The gods were cruel when they saw fit to test my vow. They waited until I was old. What could I do when the ravens brought the news from the South? The ruin of my house. The death of my family. I was helpless, blind, frail, but when I heard they had killed my brother's son, and his poor son, and the children. Even the little children!

Jon Snow:
Who are you?

Aemon Targaryen:
My father was Maekar, the first of his name. My brother Aegon reigned after him, when I had refused the throne, and his son...was Aerys...whom they called "The Mad King."

Jon Snow:
You're Aemon Targaryen.

Aemon Targaryen:
I am a Maester of the Citadel, bound in service to Castle Black and the Night's Watch. I will not tell you to stay or go. You must make that choice yourself and live with it the rest of your days, as I have.