A party of order or stability, and a party of progress or reform, are both necessary elements of a healthy state of political life.
The application of algebra to geometry ... has immortalized the name of Descartes, and constitutes the greatest single step ever made in the progress of the exact sciences.
The perpetual obstacle to human advancement is custom.
It's hardly possible to overstate the value, in the present state of human improvement, of placing human beings in contact with other persons dissimilar to themselves, and with modes of thought and action unlike those with which they are familiar. Such communication has always been... one of the primary sources of progress.
A stationary condition of capital and population implies no stationary state of human improvement. There could be as much scope as ever for all kinds of mental culture, and moral and social progress.
The triumph of the Confederacy... would be a victory for the powers of evil which would give courage to the enemies of progress and damp the sprits of its friends all over the civilized world... [The American Civil War] is destined to be a turning point, for good or evil, of the course of human affairs.
Any society which is not improving is deteriorating, and the more so the closer and more familiar it is. Even a really superior man almost always begins to deteriorate when he is habitually king of his company.
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