#Bloganuary Writing Prompt: What is your favorite quote and why?

This pretty much sums up my approach to life. It’s simple but not simplistic. If I filter it through the recurring four-gospel cycle championed by Alexander John Shaia, it involves engagement with times of enduring world-shattering change, persisting through pain and struggle, exalting the beauty of those fleeting experiences of union, and imparting the benefit of such lessons through mature service to others.
Does it haiku?
If full life you seek
First seek justice, love mercy
Then humility
American sentence (and yes it is)?
What do you know, the full quote (including citation) meets the criteria!