Who said "The most important race is the race with ourselves."?

This quote is attributed to Aldo Leopold.

The most important race is the race with ourselves. - Aldo Leopold

"The most important race is the race with ourselves."

Aldo Leopold Perseverance

Conservationist, Ecologist American 1887–1948

"In every walk with nature, one receives far more than he seeks."

"The land ethic simply enlarges the boundaries of the community to include soils, waters, plants, and animals, or collectively: the land."

"A thing is right when it tends to preserve the integrity, stability, and beauty of the biotic community; it is wrong when it tends otherwise."

"Conservation is a state of harmony between men and land."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."