A vigorous five-mile walk will do more good for an unhappy but otherwise healthy adult than all the medicine and psychology in the world. Paul Dudley White
A vigorous temper is not altogether an evil. Men who are easy as an old shoe are generally of little worth. Charles Spurgeon
Curiosity is one of the most permanent and certain characteristics of a vigorous intellect. Samuel Johnson
The love of life is necessary to the vigorous prosecution of any undertaking. Samuel Johnson
The passions grafted on wounded pride are the most inveterate; they are green and vigorous in old age. George Santayana
