The series of integers is obviously an invention of the human mind, a self-created tool which simplifies the ordering of certain sensory experiences.

The more I learn, the more I realize I don't know.

What we don't know is much more than what we know.

Somebody who only reads newspapers and at best books of contemporary authors looks to me like an extremely near-sighted person who scorns eyeglasses. He is completely dependent on the prejudices and fashions of his times, since he never gets to see or hear anything else.

Make everything as simple as possible, but not simpler. A man should look for what is, and not for what he thinks should be. We cannot solve our problems with the same thinking we used when we created them. A question that sometimes drives me hazy: am I or are the others crazy? Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction. All religions, arts and sciences are branches of the same tree. It's not that I'm so smart, it's just that I stay with problems longer.

...behind all the discernible laws and connections, there remains something subtle, intangible and inexplicable.

Galileo - the father of modern physics - indeed of modern science.