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

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.

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

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.

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.

The progressive development of man is vitally dependent on invention.

The entire Earth will be converted into a huge brain

Every living being is an engine geared to the wheel-work of the universe.

Every effort under compulsion demands a sacrifice of energy. I never paid such a price.