Ingratitude Is The Essence Of Vileness.

Things Which We See Are Not By Themselves What We See ... It Remains Completely Unknown To Us What The Objects May Be By Themselves And Apart From The Receptivity Of Our Senses. We Know Nothing But Our Manner Of Perceiving Them.

Always Treat People As Ends In Themselves, Never As Means To An End.

Always Regard Every Man As An End In Himself, And Never Use Him Merely As A Means To Your Ends [i.e., Respect That Each Person Has A Life And Purpose That Is Their Own; Do Not Treat People As Objects To Be Exploited].

The Evil Effect Of Science Upon Men Is Principally This, That By Far The Greatest Number Of Those Who Wish To Display A Knowledge Of It Accomplish No Improvement At All Of The Understanding, But Only A Perversity Of It, Not To Mention That It Serves Most Of Them As A Tool Of Vanity.

Two Things Fill The Mind With Ever New And Increasing Admiration And Awe, The Oftener And More Steadily We Reflect On Them: The Starry Heavens Above Me And The Moral Law Within Me.