Inner Freedom: A Spiritual Journey for Prison Inmates (2008)
“Thousands of candles can be lit from a single candle, And the life of the candle will not be shortened. Happiness never decreases by being shared.”
From The Teaching of Buddha http://www.bdk.or.jp/english/about/popularization/buddhist-scriptures.html, by Bukkyo Dendo Kyokai (Society for the Promotion of Buddhism), Pg 132. It is a paraphrased version of Section 10 of the Sutra of Forty-two Sections
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Gautama Buddha 121
philosopher, reformer and the founder of Buddhism -563–-483 BCRelated quotes

“Everybody is a candle, true. But not everybody is lit.”
The Eight Human Talents (2001)

“I have lit my treasured candles,
one by one, to hallow this night.”
Poem without a Hero (1963)
Context: I have lit my treasured candles,
one by one, to hallow this night.
With you, who do not come,
I wait the birth of the year.
Dear God!
the flame has drowned in crystal,
and the wine, like poison, burns
Old malice bites the air,
old ravings rave again,
though the hour has not yet struck.

“Look at how a single candle can both defy and define the darkness.”
As quoted in 7 Laws of Human Nature: The Oneness of Universal Love (2017) by Conrad Spainhower and other self-help books and quotation sites.
Disputed

“For nowadays the world is lit by lightning! Blow out your candles, Laura -- and so goodbye….”
Tom, Scene Seven
Source: The Glass Menagerie (1944)
Context: Oh, Laura, Laura, I tried to leave you behind me, but I am more faithful than I intended to be! I reach for a cigarette, I cross the street, I run into the movies or a bar, I buy a drink, I speak to the nearest stranger — anything that can blow your candles out! — for nowadays the world is lit by lightning! Blow out your candles Laura — and so goodbye…

“It is better to light a single candle than to curse the darkness.”
Variant: Light a candle instead of cursing the darkness.
Source: This is My Story

“All the darkness in the world cannot extinguish the light of a single candle.”

“Carry a candle in the dark, be a candle in the dark, know that you're a flame in the dark.”