Men passionately desire to live after death, but they often pass away without noticing the fact that the memory of a really good person always lives.… - Pyotr Kropotkin

and that they find in association the best arms for the struggle for life:

That we are utopians is well known. So utopian are we that we go the length of believing that the revolution can and ought to assure shelter, food and clothes to all – an idea extremely displeasing to middle-class citizens, whatever their party colour, for they are quite alive to the fact that it is not easy to keep the upper hand of a people whose hunger is satisfied.

"The morality which emerges from the observation of the whole animal kingdom may be summed up in the words: "Do to others what you would have them do to you in the same circumstances. And it adds: "Take note that this is merely a piece of advice; but this advice is the fruit of the long experience of animals in society. And among the great mass of social animals, man included, it has become habitual to act on this principle. Indeed without this no society could exist, no race could have vanquished the natural obstacles against which it must struggle."