Remember boy. Never forget. You can choose either the Dark Lord or you can choose Lily Evans. You cannot have both, so do not test your luck. Be with her always or lose her to your own pride. I have done all I can do.
That night Severus received those last words. He wrote them down, knowing this time he would never hear the echo again. He would realize who the voice was one day. That day was not today, however, and he had to remember these last words. He knew one day, he'd need to take them to heart.
As Severus closed his book a man who had the same name had his eyes closed. "It is done Severus. The only wish you had is complete. It is up to your younger self now."
Severus Snape turned to face Dumbledore with a blank look. "You realize what this will do?"
"Time is an odd thing Severus. You would have never been allowed this would it destroy the world as we know it." Severus began to walk forward and Albus Dumbledore followed. He turned back only for a moment to smile, I wish you the best of luck young Severus.