Gradually the conviction gained recognition that all knowledge about things is exclusively a working-over of the raw material furnished by the senses. ... Galileo and Hume first upheld this principle with full clarity and decisiveness.
The so-called Pythagoreans, who were the first to take up mathematics, not only advanced this subject, but saturated with it, they fancied that the principles of mathematics were the principles of all things.
Even matter called inorganic, believed to be dead, responds to irritants and gives unmistakable evidence of a living principle within. Everything that exists, organic or inorganic, animated or inert, is susceptible to stimulus from the outside.
The one great principle of the English law is, to make business for itself. There is no other principle distinctly, certainly, and consistently maintained through all its narrow turnings.
I have mastered the principles of several religions. They have all shocked me by the violence which I should have to do to my reason to accept the dogmas of any one of them.
Love requires that true education should be easily accessible to all and should be of use to every villager in this daily life. The emphasis laid on the principle of spending every minute of one's life usefully is the best education for citizenship.
In [the soul] one part naturally rules, and the other is subject, and the virtue of the ruler we maintain to be different from that of the subject; the one being the virtue of the rational, and the other of the irrational part. Now, it is obvious that the same principle applies generally, and therefore almost all things rule and are ruled according to nature.
He who knows not how to plant his will in things at least endows them with some meaning: that is to say, he believes that a will is already present in them (A principle of faith.)
[the virtues] cannot exist without Prudence. A proof of this is that everyone, even at the present day, in defining Virtue, after saying what disposition it is [i.e. moral virtue] and specifying the things with which it is concerned, adds that it is a disposition determined by the right principle; and the right principle is the principle determined by Prudence.
Once you become aware of your own body and its movements, you will be surprised that you are not your body. This is something of a basic principle, that if you can watch something then you are not it. You are the watcher, not the watched. You are the observer, not the observed. How can you be both?
Because of lack of moral principle, human life becomes worthless. Moral principle, truthfulness, is a key factor. If we lose that, then there is no future.