Water cuts through rock, not because of its strength, but because of its persistence.
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7 Cardinal Rules in Life
(See more at: http://www.lifehack.org/articles/lifestyle/7-cardinal-rules-life-everyone-should-know-about.html)
(See more at: http://www.lifehack.org/articles/lifestyle/7-cardinal-rules-life-everyone-should-know-about.html)