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

There is room in our ranks for the old and decrepit, as well as the young and vigorous.
Gerrit Smith

Vigorous writing is concise.
William Strunk, Jr.

Vigorous writing is concise. A sentence should contain no unnecessary words, a paragraph no unnecessary sentences, for the same reason that a drawing should have no unnecessary lines and a machine no unnecessary parts.
William Strunk, Jr.

What to an outsider will be no more than the vigorous presentation of a conviction, to an employee may be the manifestation of a determination which it is not safe to thwart.
Learned Hand

You can't get rid of it with exercise alone. You can do the most vigorous exercise and only burn up 300 calories in an hour. If you've got fat on your body, the exercise firms and tones the muscles. But when you use that tape measure, what makes it bigger? It's the fat!
Jack LaLanne

You have to be vigorous. That's the only way you are going to get it because everybody has dreams and everybody has goals, but the only people who achieve them are the ones that go after it and don't take no for an answer.
Nick Cannon