When Two People Are Really Happy About

To Act Is Easy; To Think Is Hard.

Should I Not Be Proud, When For Twenty Years I Have Had To Admit To Myself That The Great Newton And All The Mathematicians And Noble Calculators Along With Him Were Involved In A Decisive Error With Respect To The Doctrine Of Color, And That I Among Millions Was The Only One Who Knew What Was Right In This Great Subject Of Nature?

Ingratitude Is Always A Kind Of Weakness. I Have Never Known Men Of Ability To Be Ungrateful.

One Cannot Develop Taste From What Is Of Average Quality But Only From The Very Best.

Look At A Man The Way He Is And He Only Becomes Worse, But Look At Him As If He Were What He Could Be, Then He Becomes What He Should Be.