“..[I] will now work on the painting 'The bitch in Heat', I have studies of the subject for a long time already. Actually it can better be called 'The fight therefore', because in the composition in the background three large dogs have a furious fight together.”

An unspecified platform appeal, as quoted in The Musical Salvationist (September 1927). Several variants of this exist, some of them credited to his speech at the Royal Albert Hall on May 9, 1912, as researched "While Women Weep - I'll Fight" by Gordon Taylor at the International Heritage Centre (19 July 1996) http://www1.salvationarmy.org/heritage.nsf/36c107e27b0ba7a98025692e0032abaa/cdc6918c833e9a3d802568cc00539b8f!OpenDocument
Variants:
While women weep as they do now, I'll fight. While little children go hungry as they do now, I'll fight,. while men go to prison, in and out, in and out, as they do now, I'll fight.
As quoted in "To the General" by Charles Coller, in All the World (April 1906), p. 169
While women weep, as they do now, I'll fight; while little children go hungry, as they do now, I'll fight; while men go to prison, in and out, in and out, as they do now, I'll fight; while there is a drunkard left, while there is a poor lost girl upon the streets, while there remains one dark soul without the light of God, I'll fight — I'll fight to the very end!
As quoted in Booth the Beloved (1949) by J. Evan Smith, pp. 122-124; this version seems to have become the basis of the most quoted variants.
While Women weep as they do now, I'll fight. While little children go hungry, as they do now, I'll fight. While men go to prison, in and out, in and out, I'll fight. While there is a drunkard left, while there is a poor lost girl upon the streets, While there remains one dark soul without the light of God, I'll fight. I'll fight to the very end!
As quoted in What price the poor? William Booth, Karl Marx and the London Residuum (2005) by Ann M. Woodall, p. 218
Context: As long as women suffer as they do I will fight! As long as little children hungering go, as they now do, I will fight. As long as men go to the prisons, in and out, in and out, as they now do, I will fight. All who are not on the ship are in the sea. Every Soldier must do his utmost to save them.

"We Are All Bound Up Together" Speech (1866)

Source: 1930s, On my Painting (1938), pp. 12-13

—And the Moon Be Still as Bright (1948)
The Martian Chronicles (1950)

Source: Ender's Game

Source: https://notjustok.com/article/interviews/simi-in-conversation-with-notjustok-for-womens-history-month/ Simi talking about Women in the music industry

Anonymous American proverb; since 1998 this has often been attributed to Mark Twain on the internet, but no contemporary evidence of him ever using it has been located.
Variants:
It is not the size of the dog in the fight that counts, but the fight in the dog that matters.
"Stub Ends of Thoughts" by Arthur G. Lewis, a collection of sayings, in Book of the Royal Blue Vol. 14, No. 7 (April 1911), cited as the earliest known occurrence in The Dictionary of Modern Proverbs, edited by Charles Clay Doyle, Wolfgang Mieder, and Fred R. Shapiro, p. 232
It is not the size of the dog in the fight that counts, but the fight in the dog that wins.
Anonymous quote in the evening edition of the East Oregonian (20 April 1911)
What counts is not necessarily the size of the dog in the fight — it's the size of the fight in the dog.
Dwight D. Eisenhower, declaring his particular variant on the proverbial assertion in Remarks at Republican National Committee Breakfast (31 January 1958) http://www.presidency.ucsb.edu/ws/index.php?pid=11229
Misattributed