Pleasures flit by - they are only for yourself; work leaves a mark of long-lasting joy, work is for others.
Dmitri Mendeleev

There is nothing in this world that I fear to say.
Dmitri Mendeleev

It is the function of science to discover the existence of a general reign of order in nature and to find the causes governing this order. And this refers in equal measure to the relations of man - social and political - and to the entire universe as a whole.
Dmitri Mendeleev

The establishment of a law, moreover, does not take place when the first thought of it takes form, or even when its significance is recognised, but only when it has been confirmed by the results of the experiment.
Dmitri Mendeleev

We could live at the present day without a Plato, but a double number of Newtons is required to discover the secrets of nature, and to bring life into harmony with the laws of nature.
Dmitri Mendeleev

Elements which are similar as regards their chemical properties have atomic weights which are either of nearly the same value (eg. Pt, Ir, Os) or which increase regularly (eg. K, Ru, Cs).
Dmitri Mendeleev

The most all penetrating spirit before which will open the possibility of tilting not tables, but planets, is the spirit of free human inquiry. Believe only in that.
Dmitri Mendeleev

No one nor anything can silence me.
Dmitri Mendeleev