“When the sun appears which dispels darkness in general, you put out the light which dispelled it for you in particular for your need and convenience.”
The Notebooks of Leonardo da Vinci (1883), X Studies and Sketches for Pictures and Decorations
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Leonardo Da Vinci 363
Italian Renaissance polymath 1452–1519Related quotes

“The darkness of racial injustice will be dispelled only by the light of forgiving love.”
1950s, Loving Your Enemies (Christmas 1957)
Context: The darkness of racial injustice will be dispelled only by the light of forgiving love. For more that three centuries American Negroes have been frustrated by day and bewilderment by night by unbearable injustice, and burdened with the ugly weight of discrimination. Forced to live with these shameful conditions, we are tempted to become bitter and retaliate with a corresponding hate. But if this happens, the new order we seek will be little more than a duplicate of the old order. We must in strength and humility meet hate with love.

Tulsidas in "A Garden of Deeds: Ramacharitmanas, a Message of Human Ethics", p. 37
LDS General Conference (October 1964)
Context: The rising sun can dispel the darkness of night, but it cannot banish the blackness of malice, hatred, bigotry, and selfishness from the hearts of humanity. Happiness and peace will come to earth only as the light of love and human compassion enter the souls of men.
It was for this purpose that Christ, the Son of righteousness, 'with healing in his wings,' came in the Meridian of Time. Through him wickedness shall be overcome, hatred, enmity, strife, poverty, and war abolished. This will be accomplished only by a slow but never-failing process of changing men's mental and spiritual attitude. The ways and habits of the world depend upon the thoughts and soul-convictions of men and women. If, therefore, we would change the world, we must first change people's thoughts. Only to the extent that men desire peace and brotherhood can the world be made better. No peace even though temporarily obtained, will be permanent, whether to individuals or nations, unless it is built upon the solid foundation of eternal principles.
“The blackest night must end in dawn, the light dispel the dreamer's fear.”

“For as children tremble and fear everything in the blind darkness, so we in the light sometimes fear what is no more to be feared than the things that children in the dark hold in terror and imagine will come true. This terror, therefore, and darkness of mind must be dispelled not by the rays of the sun and glittering shafts of daylight, but by the aspect and law of nature.”
Nam veluti pueri trepidant atque omnia caecis
in tenebris metuunt, sic nos in luce timemus
interdum, nilo quae sunt metuenda magis quam
quae pueri in tenebris pavitant finguntque futura.
hunc igitur terrorem animi tenebrasque necessest
non radii solis neque lucida tela diei
discutiant sed naturae species ratioque.
Book II, lines 55–61 (tr. Rouse)
De Rerum Natura (On the Nature of Things)

“Melt and dispel, ye spectre-doubts, that roll
Cimmerian darkness o'er the parting soul!”
Part II, line 263
Pleasures of Hope (1799)
Interview while promoting Capitalism : A Love Story (March 2010) http://www.youtube.com/watch?v=cx2tJg91hsU
2010

Source: The Warrior Within : The Philosophies of Bruce Lee (1996), p. 126
Context: In life, what more can you ask for than to be real? To fulfill one’s potential instead of wasting energy on [attempting to] actualize one’s dissipating image, which is not real and an expenditure of one’s vital energy. We have great work ahead of us, and it needs devotion and much, much energy. To grow, to discover, we need involvement, which is something I experience every day — sometimes good, sometimes frustrating. No matter what, you must let your inner light guide you out of the darkness.