Years may wrinkle the skin, but to give up enthusiasm wrinkles the...

Who said "Years may wrinkle the skin, but to give up enthusiasm wrinkles the... "?

"Years may wrinkle the skin, but to give up enthusiasm wrinkles the... " is one of a famous quotes by Samuel Ullman. Complete quote is as follows;
"Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul. Worry, fear, self-distrust bows the heart and turns the spirit back to dust."

What is "Years may wrinkle the skin, but to give up enthusiasm wrinkles the... "?

"Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul. Worry, fear, self-distrust bows the heart and turns the spirit back to dust." This is a quote by Samuel Ullman which is about . He is known to have been associated with numerous other thought provoking quotes on these topics like;

• The heart never grows better by age I fear rather worse, always harder. A young liar will be an old one, and a young knave will only be a greater knave as he grows older.

What does "Years may wrinkle the skin, but to give up enthusiasm wrinkles the... " mean?

This quote is primarily about fear although it also includes other themes like . It is attributed to Samuel Ullman. Complete quote is as follows;
"Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul. Worry, fear, self-distrust bows the heart and turns the spirit back to dust."