Skadi

“Begone, foul dwimmerlaik, lord of carrion! Leave the dead in peace!"

A cold voice answered: 'Come not between the Nazgûl and his prey! Or he will not slay thee in thy turn. He will bear thee away to the houses of lamentation, beyond all darkness, where thy flesh shall be devoured, and thy shrivelled mind be left naked to the Lidless Eye."

A sword rang as it was drawn. "Do what you will; but I will hinder it, if I may."

"Hinder me? Thou fool. No living man may hinder me!"

Then Merry heard of all sounds in that hour the strangest. It seemed that Dernhelm laughed, and the clear voice was like the ring of steel. "But no living man am I!”
― J.R.R. Tolkien, The Lord of the Rings

“God grant me the serenity to accept the things I cannot change, courage to change the things I can, and wisdom always to tell the difference.'
Among the things Billy Pilgrim could not change were the past, the present, and the future.”
― Kurt Vonnegut, Slaughterhouse-Five

“For there is nothing lost, that may be found, if sought.”
― Edmund Spenser, The Faerie Queene

“My advice is, never do to-morrow what you can do today. Procrastination is the thief of time. Collar him!”
― Charles Dickens, David Copperfield