Creating a new theory is not like destroying an old barn and erecting a skyscraper in its place. It is rather like climbing a mountain and gaining new and wider views.

The daily struggle does not arise from a purpose or a program, but from an immediate need.

Nature shows us only the tail of the lion. But there is no doubt in my mind that the lion belongs with it even if he cannot reveal himself to the eye all at once because of his huge dimension.

Great spirits have always encountered violent opposition from mediocre minds.

Small is the number of people who see with their eyes and think with their minds.

My pacifism is not based on any intellectual theory but on a deep antipathy to every form of cruelty and hatred.

An oligarchy of private capital cannot be effectively checked even by a democratically organized political society because under existing conditions, private capitalists inevitably control, directly or indirectly, the main sources of information.