Why, I hold fate Clasped in my fist, and could command the course Of time's eternal motion, hadst thou been One thought more steady than an ebbing sea.

-Ford,John
  ' Tis Pity She's a Whore, act 5, sc.4.

I always held my flower in a clenched fist.

-Hoffer, Eric
  On his social activism as a1960s flower child. Soon to Be a Major Motion Picture.

We sing the love of danger.Courage, rashness, and rebellion are the elements of our poetry. Hitherto literature has tended to exalt thoughtful immobility, ecstasy, and sleep, whereas we are for aggressive movement, febrile insomnia, mortal leaps, and blows with the fist.We proclaim that the world is richer for a new beautyof speed, and our praise isfor themanat the wheel. There is no beauty now save in struggle, no masterpiece can be anything but aggressive, and hence we glorify war, militarism and patriotism.

-Marinetti, Emilio FilippoTomasso
  Manifesto of Futurism. Quoted in Denis Mack Smith Italy:  A Modern History (1959), p.270.

Impersonal criticism†is like an impersonal fist fight or an impersonal marriage, and as successful.

-Nathan, GeorgeJean
Quoted in Charles  Angoff (ed)  The World of George Jean Nathan (1952).

Mr Lewis'spictures appeared, as averygreat painter said to me, to have been painted bya mailed fist in a cotton glove.

-Sitwell, Dame Edith Louisa
  OnWyndham Lewis. Taken Care Of, ch.11.

Her fist of a face died clenched on a round pain; And sculptured Ann is seventy years of stone.

-Thomas, Dylan Marlais
  'After the Funeral'.