To the Dark Lord, I know I will be dead long before you read this but I want you to know that it was I who discovered your secret. I have stolen the real horcrux and intend to destroy it as soon as...

Many Potter fans interpret Dumbledore's cry to Snape as a cry for Snape to spare his life. This probably isn't likely, because Dumbledore is already surrounded by Draco Malfoy, four Death Eaters, one of them being the evil werewolf Fenir Greyback, and before then, he hasn't begged for his life...