Dmitri Mendeleev

Knowledge without conscience is the ruin of the soul.

I have spent more than 20 years on the study of solutions, and I have never found anything more interesting than this subject.

The first step is to learn; the second is to understand; the third is to apply.

I am a chemist, and I am interested in everything that concerns chemistry.

The law of periodicity is the most important law of nature.

My dear friend, I am very busy with my work, but I always remember you.

I am convinced that the future of Russia depends on the development of its industry.

The most important thing is to be honest with yourself.

I am a Russian, and I love my country.

The main thing in science is to be able to ask the right questions.

I have always tried to be useful to my country.

The future belongs to those who believe in the beauty of their dreams.

Without work, there is no life.

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

I am not a prophet, but I can see the future of chemistry.

It is my duty to serve science and my country.

The true scientist is always a dreamer.

I believe in the power of education.

The most important thing is to be persistent.

I am always looking for new knowledge.