“One of those poor fellows that had become a Christian was badgered by his companions; and one of them said, "How do you know that Jesus Christ has forgiven your sins? " The man turned at once and said, "How do you know when you have got sugar in your tea?"”
Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 17.
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John Bartholomew Gough 7
Anglo-American temperance orator 1817–1886Related quotes

Tales of Three Hemispheres http://www.gutenberg.net/dirs/1/1/4/4/11440/11440-8.txt, A Shop In Go-By Street

Variant translations
If you know others and know yourself, you will not be imperiled in a hundred battles; if you do not know others but know yourself, you win one and lose one; if you do not know others and do not know yourself, you will be imperiled in every single battle.
Know your enemy and know yourself, find naught in fear for 100 battles. Know yourself but not your enemy, find level of loss and victory. Know not thy enemy nor yourself, wallow in defeat every time.
Literal translation: Know [the] other, know [the] self, hundred battles without danger; not knowing [the] other but know [the] self, one win one loss; not knowing [the] other, not knowing [the] self, every battle must [be] lost.
Source: The Art of War, Chapter III · Strategic Attack
"Portrait of the Artist as a Naughty Boy," interview with John Mortimer, In Character (1983), p. 97
1980s

In conversation, attributed by James E. McEldowney http://people.virginia.edu/~pm9k/jem/words/gandhi.html
Posthumous publications (1950s and later)

Variant: Life will give you whatever experience is most helpful for the evolution of your consciousness. How do you know this is the experience you need? Because this is the experience you are having at the moment.
Source: A New Earth: Awakening to Your Life's Purpose