Never keep a line of retreat: it is a wretched invention.

Happiness is the struggle towards a summit and, when it is attained, it is happiness to glimpse new summits on the other side.

If nations could overcome the mutual fear and distrust whose sombre shadow is now thrown over the world, and could meet with confidence and good will to settle their possible differences, they would easily be able to establish a lasting peace.

Never stop because you are afraid - you are never so likely to be wrong.

The whole plan of extermination was nothing less than a cold blooded, calculated political measure, having for its object the annihilation of a superior element in the population, which might prove troublesome, and to this must be added the motive of greed.

The difficult is what takes a little time; the impossible is what takes a little longer.

Is it not in the struggle to obtain knowledge that happiness exists? I am very ignorant, consequently the conditions of happiness are mine.