Louis Pasteur

I am pursuing my investigations with the greatest ardor.

A man of science has no country, because knowledge belongs to humanity, and is the torch which illuminates the world.

My greatest strength has always been my persistence.

I have been so absorbed in my work that I have forgotten everything else.

I am still at work, and I hope to be able to give you some good news soon.

The greatest disturbance of my life is when I cannot work.

Without laboratories, men of science are soldiers without arms.

I have always been convinced that the greatest discoveries are made by those who are not afraid to make mistakes.

My dear Marie, I think of you always, even when I am most absorbed in my work.

I am convinced that the day will come when we shall be able to prevent all infectious diseases.

Work, work, work, and you will succeed.

I have no other ambition than to serve humanity.

I am not afraid of the difficulties, for they are only opportunities for me to prove my strength.

My only regret is that I have not done more for my country.

I have always been a man of action, not of words.

The greatest joy of my life is to see my discoveries applied to the benefit of mankind.

I am working with all my might to solve this problem.

My dear children, never forget that work is the source of all happiness.

I have faith in the future of science.

The greatest victory is to conquer oneself.