The Century Is Advanced, But Every Individual

The Use Of A Thing Is Only A Part Of Its Significance. To Know Anything Thoroughly, To Have The Full Command Of It In All Its Appliances, We Must Study It On Its Own Account, Independently Of Any Special Application.

If The World Does Improve On The Whole, Yet Youth Must Always Begin Anew, And Go Through The Stages Of Culture From The Beginning.

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?

Talk Well Of The Absent Whenever You Have The Opportunity.

Take Life Too Seriously, And What Is It Worth? If The Morning Wake Us To No New Joys, If The Evening Bring Us Not The Hope Of New Pleasure, Is It Worthwhile To Dress And Undress?