After all, science is essentially international, and it is only through lack of the historical sense that national qualities have been attributed to it.

Scientist believe in things, not in person

If it takes a hundred years, it will be a pity, but I will not cease to work for it as long as I live.

Each of us must work for his own improvement, and at the same time share a general responsibility for all humanity.

Life is not easy for any of us. But what of that? We must have perseverance and above all confidence in ourselves. We must believe that we are gifted for something, and that this thing, at whatever cost, must be attained.

It's always good to marry your best friend.

I was taught that the way of progress was neither swift nor easy.