What are the chances of everybody doing exactly what you think they should do the right way every day?
Zero
What are the chances of the people you love doing what you want them to do the way you want them to do them everyday?
Zero.
What are the chances of you doing everything every day, even if you’re talented and disciplined?
Zero.
So, your happiness will never last as long as it’s got expectation behind it.
– @TonyRobbins to @LewisHowes
This quote echos the sentiments outlined Mo Gawdat’s recent book, Solve For Happiness 
Mohammad “Mo” Gawdat is the Chief Business Officer for Google X, an entrepreneur, and the author of the book Solve for Happy.[1][2]
Check out Solve for Happy: Engineer Your Path to Joy by Mo Gawdat at http://amzn.to/2sgmGP5