Irresolution on the schemes of life I which offer themselves to our choice, and inconstancy in pursuing them, are the greatest causes of all unhappiness.
The opinions which we hold of one another, our relations with friends and kinsfolk are in no sense permanent, save in appearance, but are as eternally fluid as the sea itself.
Every advance in social progress removes us more and more from the guidance of instinct, obliging us to depend upon reason for the assurance that our habits are really agreeable to the laws of health.