Dmitri Mendeleev

No law of nature, however general, has been established all at once; its recognition has always been preceded by many presentiments. ”

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. ”

There exists everywhere a medium in things, determined by equilibrium. ”

Work, look for peace and calm in work: you will find it nowhere else. ”