Sometimes I feel that by not marrying, I made too great a sacrifice to my work.

I can see so far because I stood on the shoulders of giants.

Physics, beware of metaphysics.

Nature is pleased with simplicity. And nature is no dummy.

God created everything by number, weight and measure.

I consider my greatest accomplishment to be lifelong celibacy.

There are more sure marks of authenticity in the Bible than in any profane history.

No great discovery was ever made without a bold guess.

What we know is a drop, what we don't know is an ocean.

I am equally proud of my Serbian origin and my Croatian fatherland.

My Mother had taught me to seek all truth in the Bible.

If Mr Edison had thought smarter he wouldn't sweat as much.

Inventors don't have time for married life.

The individual is ephemeral, races and nations come and pass away, but man remains.

Perhaps I failed, but I did my best, These masters of mine may do the rest.

I have always been ahead of my time.

Great moments are born with great opportunity.

Of all things, I liked books best.

Nature may reach the same result in many ways.