Quote from Rick Riordan, The Son of Neptune

Two hundred Romans, and no one’s got a pen? Never mind!” He slung his M16 onto his back and pulled out a hand grenade. There were many screaming Romans. Then the hand grenade morphed into a ballpoint pen, and Mars began to write. Frank looked at Percy with wide eyes. He mouthed: Can your sword do grenade form?Percy mouthed back, No. Shut up.

Rick Riordan, The Son of Neptune 

Quote from Harlan Ellison, Paingod and Other Delusions

I know that pain is the most important thing in the universes. Greater than survival, greater than love, greater even than the beauty it brings about. For without pain, there can be no pleasure. Without sadness, there can be no happiness. Without misery there can be no beauty. And without these, life is endless, hopeless, doomed and damned. Adult. You have become adult.

Harlan Ellison, Paingod and Other Delusions