I want you to have this feeling too - it is my moral responsibility to help you achieve this inner freedom.

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

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.

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

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