Quote from : Star Wars: Episode VI - Return of the Jedi Movie

Darth Vader: Luke... help me take this mask off.
Luke: But you'll die.
Darth Vader: Nothing... can stop that now. Just for once... let me... look on you with my *own* eyes.
[Luke takes off Darth Vader's mask one piece at a time. Underneath, Luke sees the face of a pale, scarred, bald-headed, old man - his father, Anakin. Anakin sadly looks at Luke but then gives a tired smile]
Anakin: Now... go, my son. Leave me.
Luke: No. You're coming with me. I'll not leave you here, I've got to save you.
Anakin: You already... have, Luke. You were right. You were right about me. Tell your sister... you were right.
[Anakin smiles and his eyes begin to droop slumps down in death while giving one last dying breath]
Luke: Father... I won't leave you.