Sin makes its own hell, and goodness its own heaven.

Sin makes its own hell, and goodness its own heaven.

To the fool, he who speaks wisdom will sound foolish.

To the fool, he who speaks wisdom will sound foolish.

There are no chaste minds. Minds copulate wherever they meet.

There are no chaste minds. Minds copulate wherever they meet.

To illustrate the difference between the innovator and the dull crowd of routinists who cannot even imagine that any improvement read more

To illustrate the difference between the innovator and the dull crowd of routinists who cannot even imagine that any improvement is possible, we need only refer to a passage in Engel's most famous book. Here, in 1878, Engels apodictically announced that military weapons are "now so perfected that no further progress of any revolutionizing influence is any longer possible." Henceforth "all further [technological] progress is by and large indifferent for land warfare. The age of evolution is in this regard essentially closed." This complacent conclusion shows in what the achievement of the innovator consists: he accomplishes what other people believe to be unthinkable and unfeasible.

The trouble with people is not that they don't know but that they know so much that ain't so.

The trouble with people is not that they don't know but that they know so much that ain't so.

It is easier to love humanity than to love your neighbor.

It is easier to love humanity than to love your neighbor.

To think is to differ.

To think is to differ.

It is highly significant, and indeed almost a rule, that moral courage has its source in identification through one's own read more

It is highly significant, and indeed almost a rule, that moral courage has its source in identification through one's own sensitivity with the suffering of one's fellow human beings.

The greatest people will be those who possess the best capacities, cultivated with the best habits.

The greatest people will be those who possess the best capacities, cultivated with the best habits.