comments on the pursuit of truth, etc.
If one only wished to be happy, this could be easily accomplished; but we wish to be happier than other people, and this is always difficult, for we believe others to be happier than they are.
Montesquieu
https://www.forbes.com/quotes/6912/
“Farming looks mighty easy when your plow is a pencil and you're a thousand miles from the corn field.” – Dwight D. Eisenhower