It is perilous to study too deeply the arts of the Enemy, for good or for ill.

Green are the leaves I leave in Mirkwood.

The road goes ever on and on

It is not despair, for despair is only for those who see the end beyond all doubt. We do not.

He knew that all the hazards and perils were now drawing together to a point: the next day would be a day of doom, the day of final effort or disaster, the last gasp.

I come from under the hill, and under the hills and over the hills my paths led. And through the air. I am he that walks unseen. I am the clue-finder, the web-cutter, the stinging fly. I was chosen for the lucky number. I am he that buries his friends alive and drowns them and draws them alive again from the water. I came from the end of a bag, but no bag went over me. I am the friend of bears and the guest of eagles. I am Ringwinner and Luckwearer; and I am Barrel-rider.

Speak politely to an enraged dragon.