You cannot know if you will be successful or not. You can only prepare for battle and it must be don...

You cannot know if you will be successful or not. You can only prepare for battle and it must be done with all of your heart and with all of your consciousness. In that manner, you will have an edge.

Sun Tzu

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2017 November 05	Link: https://books.google.com/books?id=D5fTAgAAQBAJ&pg=PT10&lpg=PT10&dq=You+cannot+know+if+you+will+be+successful+or+not.+You+can+only+prepare+for+battle+and+it+must+be+done+with+all+of+your+heart+and+with+all+of+your+consciousness.+In+that+manner,+you+will+have+an+edge.+sun+tzu&source=bl&ots=2YPIQ-uRar&sig=z2ilvFdPjruhlLiokps_gvhImOY&hl=en&sa=X&ved=0ahUKEwjjqOO1lojVAhULxLwKHSFOCKUQ6AEIODAD#v=onepage&q=You%20cannot%20know%20if%20you%20will%20be%20successful%20or%20not.%20You%20can%20only%20prepare%20for%20battle%20and%20it%20must%20be%20done%20with%20all%20of%20your%20heart%20and%20with%20all%20of%20your%20consciousness.%20In%20that%20manner%2C%20you%20will%20have%20an%20edge.%20sun%20tzu&f=false	Image evidence

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Sun Tzu

Ancient Chinese military general, strategist and philosopher from the Zhou Dynasty

543 - 495BC

Wikipedia