This is a cool thread, I'm glad you started this.

I also really like your first quote from C. S. Lewis, he has said lots of wise things and has written lots of great books. There is also a documentary/movie about C. S. Lewis called The Most Reluctant Convert, I haven't watched it yet but it's about how C. S. Lewis went from being an Atheist to a Christian.

A lot of my favorite quotes are from John F. Kennedy who is my favorite president.

"If not us, who? If not now, when?" -JFK

"Every accomplishment starts with the decision to try." -JFK

"As we express our gratitude, we must never forget that the highest form of appreciation is not to utter words, but to live by them." -JFK

"Too often we enjoy the comfort of opinion without the discomfort of thought." -JFK

"Those who dare to fail miserably can achieve greatly." -JFK

"The greater our knowledge increases the more our ignorance unfolds." -JFK

Now that I look at all these quotes, I wonder how many JFK came up with, and how many his speechwriter came up with, but now JFK gets credit for them because he was the one who read them in front of people. I looked it up and his speechwriter was Ted Sorenson. It's interesting to think about.

Some of my other favorites are:

"You are not only responsible for what you say, but also for what you do not say." -Martin Luther

"Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid." -Albert Einstein 

-There are two means of refuge from the miseries of life - music and cats. -Albert Schweitzer

-Way down deep, we're all motivated by the same urges. Cats have the courage to live by them. -Jim Davis

-The smallest feline is a masterpiece. -Leonardo da Vinci

-I wish I could write as mysterious as a cat. -Edgar Allen Poe

-I have studied many philosiphers and many cats. The wisdom of cats is infinitely superior. -Hippoyte Taine

-If man could be crossed with cat it would improve the man but deteriorate the cat. -Mark Twain

-The phrase 'domestic cat' is an oxymoron. -George Will

-In its flawless grace and superior self-sufficiency I have seen a symbol of the perfect beauty and bland impersonalityy of the universe itself, obviously considered, and in its air of silent mystery there resides for me all the wonder and fascination of the unknown. -H.P. Lovecraft

ooh.  

"Why, sometimes I've believed as many as six impossible things before breakfast." ~ The White Queen, Lewis Carroll 

"Everything you can imagine is real." ~ Pablo Picasso

"When in doubt, go to the library." ~ Ron Weasley, J.K. Rowling 

as you can see...most of my fave quotes come from book characters. 

"I didn't dream of success, I worked for it."--Estée Lauder

"Though she be but little, yet she is fierce." --William Shakespeare (Helena, from Midsummer Night's Dream.)

"There's a million things I haven't done, but just you wait." --Lin Manuel Miranda (As Hamilton) 

"Me, just now."- The Mad Hatter, from Disney's Alice through The Looking Glass book.