1. "The apostle James tells us that a man who can control his tongue can control the rest of his body as well. This goes double for the man who is putting what the tongue does into a more permanent setting."
- Douglas Wilson, Wordsmithy: Hot Tips for the Writing Life
2. "My knives are like a tongue - I love, I do not love, I hate. If you don’t love me, I am ready to attack. I am a double-edged knife."
- Quote by Louise Bourgeois
3. "Double, double toil and trouble, he chanted under his breath. Fire burn and caldron bubble. Fillet of a fenny snake, in the caldron boil and bake. Eye of newt and toe of frog, wool of bat and tongue of dog … He couldn’t recall what came next and abandoned the"
- Diana Gabaldon, Written in My Own Heart's Blood
4. "Eye of newt, and toe of frog, Wool of bat, and tongue of dog, Adder's fork, and blind-worm's sting, Lizard's leg, and owlet's wing,— For a charm of powerful trouble, Like a hell-broth boil and bubble. Double, double toil and trouble; Fire burn, and caldron bubble."
- Quote by William Shakespeare