Update README.md

Author: Taras

README.md

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 # <img src="https://raw.githubusercontent.com/bobocode-projects/resources/master/image/logo_transparent_background.png" height=50/>Java 8 exercises
 The list of exercises dedicated to training your Java 8 and functional programming skills
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+### No pain, No gain :heavy_exclamation_mark:
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+> Skill is only developed by hours and hours and hours of beating on your craft
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+Working on real problems, you're focused on finding a solution. Learning new things, you're trying to understand how it works.
+It is important to have a different type of activities, which purpose is improving your skill 
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+***An exercise** is a predefined task that you continuously implement to improve a certain skill* :muscle:
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