Millions saw the apple fall, but Newton asked why

-Bernard Baruch

I have no special talents. I am only passionately curious

-Albert Einstein

You know children are growing ups hen they start asking questions that have answers.

-John J. Plomp

The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' (I found it!) but 'That's funny ...

- Isaac Asimov

Why is it that when one man builds a wall, the next man immediately needs to know what's on the other side of it?

-George R.R. Martin (Game of Thrones)

The important thing is not to stop questioning.  Curiosity has its own reason for existing. One cannot help but be in awe when he contemplates the mysteries of eternity, of life of the marvelous structure of reality.  It is enough if one tries merely to comprehend a little of this mystery every day.  Never lose a holy curiosity

-Albert Einstein

The unexamined life is not worth living 

- Plato