Who with a little cannot be content, endures an everlasting punishment.

Who with a little cannot be content, endures an everlasting punishment.

Discontent is the first necessity of progress.

Discontent is the first necessity of progress.

Who is not satisfied with himself will grow; who is not sure of his own correctness will learn many things.

Who is not satisfied with himself will grow; who is not sure of his own correctness will learn many things.

One thing only has been lent to youth and age in common--discontent.

One thing only has been lent to youth and age in common--discontent.

Discontent is want of self-reliance; it is infirmity of will

Discontent is want of self-reliance; it is infirmity of will

The greatest weariness comes from work not done.

The greatest weariness comes from work not done.

If necessity is the mother of invention, discontent is the father of progress.

If necessity is the mother of invention, discontent is the father of progress.

I used to think I had ambition . . . but now I'm not so sure. It may have been read more

I used to think I had ambition . . . but now I'm not so sure. It may have been only discontent. They're easily confused.

Content makes poor men rich; Discontent makes rich men poor.

Content makes poor men rich; Discontent makes rich men poor.