One of the most obvious ways dogs can improve our physical and mental health is via daily walks.
The use of knowledge in our sex (beside the amusement of solitude) is to moderate the passions and learn to be contented with a small expense, which are the certain effects of a studious life and, it may be, preferable even to that fame which men have engrossed to themselves and will not suffer us to share.
Nature has not placed us in an inferior rank to men, no more than the females of other animals, where we see no distinction of capacity, though I am persuaded if there was a commonwealth of rational horses... it would be an established maxim amongst them that a mare could not be taught to pace.
The secret of being miserable is to have leisure to bother about whether you are happy or not. The cure for it is occupation, because occupation means pre-occupation; and the pre-occupied person is neither happy nor unhappy, but simply alive and active. That is why it is necessary to happiness that one should be tired.