Neither a person nor a nation can exist without some higher idea. And there is only one higher idea on earth, and it is the idea of the immortality of the human soul, for all other "higher" ideas of life by which humans might live derive from that idea alone.
Sensual pleasure passes and vanishes, but the friendship between us, the mutual confidence, the delight of the heart, the enchantment of the soul, these things do not perish and can never be destroyed.
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.
Thought is the seed of action; but action is as much its second form as thought is its first. It rises in thought, to the end that it may be uttered and acted. Always in proportion to the depth of its sense does it knock importunately at the gates of the soul, to be spoken, to be done.