Millions said apple fell; Newton was the one to ask why!
--
don't know who quoted it

Tough times never last, but tough people do!
--
A book by some author

"If you have an apple and I also have an apple and we exchange the apples, then you and I will still each have one apple. But if you have an idea and I also have an idea and we exchange those ideas, then each of us will have two ideas."
--
George Bernard Shaw
1856-1950