The formula for happiness

 https://flic.kr/p/4zRz6G

'Formula of my happiness: a Yes, a No, a straight line, a goal.'

Nietzsche, Twilight of the Idols 

What is valuable

 https://flic.kr/p/51WCVS

'What's valuable is what gives us the potency to cultivate the best life we can within the circumstances we've inherited or created.'

 Damon Young 2009 Distraction Melbourne University Press

pain

 https://flic.kr/p/7sZEn

'There is a great deal of pain in life and perhaps the only pain that can be avoided is the pain that comes from trying to avoid pain.'

R. D. Laing